1551565252 has 36 divisors (see below), whose sum is σ = 2881745580. Its totient is φ = 730399680.

The previous prime is 1551565241. The next prime is 1551565261. The reversal of 1551565252 is 2525651551.

It can be written as a sum of positive squares in 2 ways, for example, as 911677636 + 639887616 = 30194^2 + 25296^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136774 + ... + 147682.

Almost surely, 2^1551565252 is an apocalyptic number.

It is an amenable number.

1551565252 is a deficient number, since it is larger than the sum of its proper divisors (1330180328).

1551565252 is a wasteful number, since it uses less digits than its factorization.

1551565252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11012 (or 10979 counting only the distinct ones).

The product of its digits is 75000, while the sum is 37.

The square root of 1551565252 is about 39389.9130742884. The cubic root of 1551565252 is about 1157.6839569736.

The spelling of 1551565252 in words is "one billion, five hundred fifty-one million, five hundred sixty-five thousand, two hundred fifty-two".