161525316 has 24 divisors (see below), whose sum is σ = 383072704. Its totient is φ = 52958880.

The previous prime is 161525311. The next prime is 161525317. The reversal of 161525316 is 613525161.

It is not an unprimeable number, because it can be changed into a prime (161525311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 109600 + ... + 111063.

Almost surely, 2^161525316 is an apocalyptic number.

It is an amenable number.

161525316 is an abundant number, since it is smaller than the sum of its proper divisors (221547388).

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

161525316 is a wasteful number, since it uses less digits than its factorization.

161525316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220731 (or 220729 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 161525316 is about 12709.2610328060. The cubic root of 161525316 is about 544.6032137015.

The spelling of 161525316 in words is "one hundred sixty-one million, five hundred twenty-five thousand, three hundred sixteen".