161607272 has 16 divisors (see below), whose sum is σ = 306015300. Its totient is φ = 80003200.

The previous prime is 161607263. The next prime is 161607307. The reversal of 161607272 is 272706161.

161607272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 161442436 + 164836 = 12706^2 + 406^2 .

It is a super-2 number, since 2×161607272² = 52233820726563968, which contains 22 as substring.

161607272 is a modest number, since divided by 7272 gives 1616 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99197 + ... + 100812.

Almost surely, 2^161607272 is an apocalyptic number.

It is an amenable number.

161607272 is a deficient number, since it is larger than the sum of its proper divisors (144408028).

161607272 is a wasteful number, since it uses less digits than its factorization.

161607272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200116 (or 200112 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 161607272 is about 12712.4848869133. The cubic root of 161607272 is about 544.6953064983.

It can be divided in two parts, 16160 and 7272, that added together give a palindrome (23432).

The spelling of 161607272 in words is "one hundred sixty-one million, six hundred seven thousand, two hundred seventy-two".