161259552 has 96 divisors (see below), whose sum is σ = 498052800. Its totient is φ = 50586624.

The previous prime is 161259547. The next prime is 161259557. The reversal of 161259552 is 255952161.

161259552 is a `hidden beast` number, since 1 + 6 + 12 + 595 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (161259547) and next prime (161259557).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×161259552² = 52009286222481408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161259557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9199 + ... + 20177.

It is an arithmetic number, because the mean of its divisors is an integer number (5188050).

Almost surely, 2^161259552 is an apocalyptic number.

161259552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161259552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249026400).

161259552 is an abundant number, since it is smaller than the sum of its proper divisors (336793248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161259552 is a wasteful number, since it uses less digits than its factorization.

161259552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11015 (or 11001 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 161259552 is about 12698.8012032632. The cubic root of 161259552 is about 544.3043639926.

The spelling of 161259552 in words is "one hundred sixty-one million, two hundred fifty-nine thousand, five hundred fifty-two".