161233572 has 48 divisors (see below), whose sum is σ = 382886784. Its totient is φ = 52800000.

The previous prime is 161233571. The next prime is 161233577. The reversal of 161233572 is 275332161.

It is not an unprimeable number, because it can be changed into a prime (161233571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182572 + ... + 183452.

It is an arithmetic number, because the mean of its divisors is an integer number (7976808).

Almost surely, 2^161233572 is an apocalyptic number.

161233572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161233572 is an abundant number, since it is smaller than the sum of its proper divisors (221653212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161233572 is a wasteful number, since it uses less digits than its factorization.

161233572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1138 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 161233572 is about 12697.7782308560. The cubic root of 161233572 is about 544.2751320563.

The spelling of 161233572 in words is "one hundred sixty-one million, two hundred thirty-three thousand, five hundred seventy-two".