161465631 has 8 divisors (see below), whose sum is σ = 215738880. Its totient is φ = 107418072.

The previous prime is 161465621. The next prime is 161465657. The reversal of 161465631 is 136564161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161465631 - 2⁵ = 161465599 is a prime.

It is a super-2 number, since 2×161465631² = 52142299988456322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161465592 and 161465601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161465621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54745 + ... + 57618.

It is an arithmetic number, because the mean of its divisors is an integer number (26967360).

Almost surely, 2^161465631 is an apocalyptic number.

161465631 is a deficient number, since it is larger than the sum of its proper divisors (54273249).

161465631 is a wasteful number, since it uses less digits than its factorization.

161465631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112845.

The product of its digits is 12960, while the sum is 33.

The square root of 161465631 is about 12706.9127249698. The cubic root of 161465631 is about 544.5361269067.

The spelling of 161465631 in words is "one hundred sixty-one million, four hundred sixty-five thousand, six hundred thirty-one".