161325256 has 8 divisors (see below), whose sum is σ = 302484870. Its totient is φ = 80662624.

The previous prime is 161325253. The next prime is 161325299. The reversal of 161325256 is 652523161.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 35212356 = 11230^2 + 5934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (161325253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10082821 + ... + 10082836.

Almost surely, 2^161325256 is an apocalyptic number.

It is an amenable number.

161325256 is a deficient number, since it is larger than the sum of its proper divisors (141159614).

161325256 is a wasteful number, since it uses less digits than its factorization.

161325256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20165663 (or 20165659 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 161325256 is about 12701.3879556527. The cubic root of 161325256 is about 544.3782782041.

The spelling of 161325256 in words is "one hundred sixty-one million, three hundred twenty-five thousand, two hundred fifty-six".