161465031 has 48 divisors (see below), whose sum is σ = 303960384. Its totient is φ = 80151552.

The previous prime is 161465023. The next prime is 161465071. The reversal of 161465031 is 130564161.

161465031 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 650 + 3 + 1 = 666.

It is not a de Polignac number, because 161465031 - 2³ = 161465023 is a prime.

It is a super-2 number, since 2×161465031² = 52141912471661922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161464986 and 161465004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161465071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8125 + ... + 19721.

It is an arithmetic number, because the mean of its divisors is an integer number (6332508).

Almost surely, 2^161465031 is an apocalyptic number.

161465031 is a deficient number, since it is larger than the sum of its proper divisors (142495353).

161465031 is a wasteful number, since it uses less digits than its factorization.

161465031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11640 (or 11637 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 161465031 is about 12706.8891157513. The cubic root of 161465031 is about 544.5354524142.

The spelling of 161465031 in words is "one hundred sixty-one million, four hundred sixty-five thousand, thirty-one".