161525900 has 36 divisors (see below), whose sum is σ = 351071280. Its totient is φ = 64507200.

The previous prime is 161525899. The next prime is 161525933. The reversal of 161525900 is 9525161.

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, 106145 + ... + 107655.

It is an arithmetic number, because the mean of its divisors is an integer number (9751980).

Almost surely, 2^161525900 is an apocalyptic number.

161525900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161525900 is an abundant number, since it is smaller than the sum of its proper divisors (189545380).

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

161525900 is a wasteful number, since it uses less digits than its factorization.

161525900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2587 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 161525900 is about 12709.2840081572. The cubic root of 161525900 is about 544.6038700443.

The spelling of 161525900 in words is "one hundred sixty-one million, five hundred twenty-five thousand, nine hundred".