161835025 has 24 divisors (see below), whose sum is σ = 220968000. Its totient is φ = 116596800.

The previous prime is 161835017. The next prime is 161835031. The reversal of 161835025 is 520538161.

It is not a de Polignac number, because 161835025 - 2³ = 161835017 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 27276 + ... + 32674.

It is an arithmetic number, because the mean of its divisors is an integer number (9207000).

Almost surely, 2^161835025 is an apocalyptic number.

It is an amenable number.

161835025 is a deficient number, since it is larger than the sum of its proper divisors (59132975).

161835025 is a wasteful number, since it uses less digits than its factorization.

161835025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529 (or 5524 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 161835025 is about 12721.4395804877. The cubic root of 161835025 is about 544.9510659429.

The spelling of 161835025 in words is "one hundred sixty-one million, eight hundred thirty-five thousand, twenty-five".