161130552 has 64 divisors (see below), whose sum is σ = 443871360. Its totient is φ = 48336000.

The previous prime is 161130527. The next prime is 161130577. The reversal of 161130552 is 255031161.

It is an interprime number because it is at equal distance from previous prime (161130527) and next prime (161130577).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23643 + ... + 29685.

It is an arithmetic number, because the mean of its divisors is an integer number (6935490).

Almost surely, 2^161130552 is an apocalyptic number.

161130552 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 161130552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221935680).

161130552 is an abundant number, since it is smaller than the sum of its proper divisors (282740808).

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

161130552 is a wasteful number, since it uses less digits than its factorization.

161130552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164 (or 6160 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 161130552 is about 12693.7209674705. The cubic root of 161130552 is about 544.1591860411.

The spelling of 161130552 in words is "one hundred sixty-one million, one hundred thirty thousand, five hundred fifty-two".