1528752231 has 8 divisors (see below), whose sum is σ = 2264818160. Its totient is φ = 1019168136.

The previous prime is 1528752227. The next prime is 1528752233. The reversal of 1528752231 is 1322578251.

1528752231 is a `hidden beast` number, since 1 + 52 + 87 + 522 + 3 + 1 = 666.

It is not a de Polignac number, because 1528752231 - 2² = 1528752227 is a prime.

It is a super-2 number, since 2×1528752231² = 4674166767574954722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528752233) 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, 28310200 + ... + 28310253.

It is an arithmetic number, because the mean of its divisors is an integer number (283102270).

Almost surely, 2^1528752231 is an apocalyptic number.

1528752231 is a deficient number, since it is larger than the sum of its proper divisors (736065929).

1528752231 is an equidigital number, since it uses as much as digits as its factorization.

1528752231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56620462 (or 56620456 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 1528752231 is about 39099.2612590059. The cubic root of 1528752231 is about 1151.9820214751.

The spelling of 1528752231 in words is "one billion, five hundred twenty-eight million, seven hundred fifty-two thousand, two hundred thirty-one".