161632371 has 8 divisors (see below), whose sum is σ = 219043024. Its totient is φ = 105988320.

The previous prime is 161632319. The next prime is 161632409. The reversal of 161632371 is 173236161.

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

It is not a de Polignac number, because 161632371 - 2²² = 157438067 is a prime.

It is a super-2 number, since 2×161632371² = 52250046710163282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161632871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441436 + ... + 441801.

It is an arithmetic number, because the mean of its divisors is an integer number (27380378).

Almost surely, 2^161632371 is an apocalyptic number.

161632371 is a deficient number, since it is larger than the sum of its proper divisors (57410653).

161632371 is an equidigital number, since it uses as much as digits as its factorization.

161632371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883301.

The product of its digits is 4536, while the sum is 30.

The square root of 161632371 is about 12713.4720277350. The cubic root of 161632371 is about 544.7235036613.

The spelling of 161632371 in words is "one hundred sixty-one million, six hundred thirty-two thousand, three hundred seventy-one".