161862552 has 48 divisors (see below), whose sum is σ = 441749880. Its totient is φ = 53542320.

The previous prime is 161862541. The next prime is 161862587. The reversal of 161862552 is 255268161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

161862552 is a `hidden beast` number, since 16 + 18 + 625 + 5 + 2 = 666.

161862552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1235527 + ... + 1235657.

Almost surely, 2^161862552 is an apocalyptic number.

161862552 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 161862552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220874940).

161862552 is an abundant number, since it is smaller than the sum of its proper divisors (279887328).

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

161862552 is an frugal number, since it uses more digits than its factorization.

161862552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 136 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 161862552 is about 12722.5214482036. The cubic root of 161862552 is about 544.9819616396.

The spelling of 161862552 in words is "one hundred sixty-one million, eight hundred sixty-two thousand, five hundred fifty-two".