161255272 has 24 divisors (see below), whose sum is σ = 304477650. Its totient is φ = 80064864.

The previous prime is 161255267. The next prime is 161255293. The reversal of 161255272 is 272552161.

161255272 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 only one way, i.e., 115476516 + 45778756 = 10746^2 + 6766^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316554 + ... + 317062.

Almost surely, 2^161255272 is an apocalyptic number.

It is an amenable number.

161255272 is a deficient number, since it is larger than the sum of its proper divisors (143222378).

161255272 is an equidigital number, since it uses as much as digits as its factorization.

161255272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 710 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 161255272 is about 12698.6326823009. The cubic root of 161255272 is about 544.2995484777.

The spelling of 161255272 in words is "one hundred sixty-one million, two hundred fifty-five thousand, two hundred seventy-two".