161380572 has 24 divisors (see below), whose sum is σ = 377239296. Its totient is φ = 53695728.

The previous prime is 161380537. The next prime is 161380613. The reversal of 161380572 is 275083161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5188 + ... + 18699.

It is an arithmetic number, because the mean of its divisors is an integer number (15718304).

Almost surely, 2^161380572 is an apocalyptic number.

161380572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161380572 is an abundant number, since it is smaller than the sum of its proper divisors (215858724).

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

161380572 is a wasteful number, since it uses less digits than its factorization.

161380572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24457 (or 24455 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 161380572 is about 12703.5653263169. The cubic root of 161380572 is about 544.4404907976.

The spelling of 161380572 in words is "one hundred sixty-one million, three hundred eighty thousand, five hundred seventy-two".