161535312 has 60 divisors (see below), whose sum is σ = 456505504. Its totient is φ = 53317440.

The previous prime is 161535301. The next prime is 161535323. The reversal of 161535312 is 213535161.

161535312 is a `hidden beast` number, since 1 + 615 + 35 + 3 + 12 = 666.

161535312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161535301) and next prime (161535323).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9387 + ... + 20277.

Almost surely, 2^161535312 is an apocalyptic number.

161535312 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 161535312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228252752).

161535312 is an abundant number, since it is smaller than the sum of its proper divisors (294970192).

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

161535312 is a wasteful number, since it uses less digits than its factorization.

161535312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008 (or 10999 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 161535312 is about 12709.6542832604. The cubic root of 161535312 is about 544.6144477330.

The spelling of 161535312 in words is "one hundred sixty-one million, five hundred thirty-five thousand, three hundred twelve".