152331521 has 4 divisors (see below), whose sum is σ = 152963844. Its totient is φ = 151699200.

The previous prime is 152331511. The next prime is 152331527. The reversal of 152331521 is 125133251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133287025 + 19044496 = 11545^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 152331521 - 2²² = 148137217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152331527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315800 + ... + 316281.

It is an arithmetic number, because the mean of its divisors is an integer number (38240961).

Almost surely, 2^152331521 is an apocalyptic number.

It is an amenable number.

152331521 is a deficient number, since it is larger than the sum of its proper divisors (632323).

152331521 is an equidigital number, since it uses as much as digits as its factorization.

152331521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632322.

The product of its digits is 900, while the sum is 23.

The square root of 152331521 is about 12342.2656348014. The cubic root of 152331521 is about 534.0680441377.

Adding to 152331521 its reverse (125133251), we get a palindrome (277464772).

The spelling of 152331521 in words is "one hundred fifty-two million, three hundred thirty-one thousand, five hundred twenty-one".