152121231 has 6 divisors (see below), whose sum is σ = 219730680. Its totient is φ = 101414148.

The previous prime is 152121227. The next prime is 152121257. The reversal of 152121231 is 132121251.

152121231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 152121231 - 2² = 152121227 is a prime.

It is a super-2 number, since 2×152121231² = 46281737841910722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152121271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8451171 + ... + 8451188.

It is an arithmetic number, because the mean of its divisors is an integer number (36621780).

Almost surely, 2^152121231 is an apocalyptic number.

152121231 is a deficient number, since it is larger than the sum of its proper divisors (67609449).

152121231 is a wasteful number, since it uses less digits than its factorization.

152121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16902365 (or 16902362 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 152121231 is about 12333.7435922756. The cubic root of 152121231 is about 533.8221749353.

Adding to 152121231 its reverse (132121251), we get a palindrome (284242482).

The spelling of 152121231 in words is "one hundred fifty-two million, one hundred twenty-one thousand, two hundred thirty-one".