161572152 has 32 divisors (see below), whose sum is σ = 461635200. Its totient is φ = 46163424.

The previous prime is 161572133. The next prime is 161572153. The reversal of 161572152 is 251275161.

It is a super-2 number, since 2×161572152² = 52211120603822208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161572153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480702 + ... + 481037.

It is an arithmetic number, because the mean of its divisors is an integer number (14426100).

Almost surely, 2^161572152 is an apocalyptic number.

161572152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161572152 is an abundant number, since it is smaller than the sum of its proper divisors (300063048).

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

161572152 is a wasteful number, since it uses less digits than its factorization.

161572152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961755 (or 961751 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 161572152 is about 12711.1034926162. The cubic root of 161572152 is about 544.6558464648.

The spelling of 161572152 in words is "one hundred sixty-one million, five hundred seventy-two thousand, one hundred fifty-two".