1553513125 has 20 divisors (see below), whose sum is σ = 2055476412. Its totient is φ = 1169696000.

The previous prime is 1553513119. The next prime is 1553513141. The reversal of 1553513125 is 5213153551.

It can be written as a sum of positive squares in 10 ways, for example, as 456976129 + 1096536996 = 21377^2 + 33114^2 .

It is not a de Polignac number, because 1553513125 - 2⁷ = 1553512997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62482 + ... + 83731.

Almost surely, 2^1553513125 is an apocalyptic number.

It is an amenable number.

1553513125 is a deficient number, since it is larger than the sum of its proper divisors (501963287).

1553513125 is an equidigital number, since it uses as much as digits as its factorization.

1553513125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146250 (or 146235 counting only the distinct ones).

The product of its digits is 11250, while the sum is 31.

The square root of 1553513125 is about 39414.6308494701. The cubic root of 1553513125 is about 1158.1682159732.

Adding to 1553513125 its reverse (5213153551), we get a palindrome (6766666676).

The spelling of 1553513125 in words is "one billion, five hundred fifty-three million, five hundred thirteen thousand, one hundred twenty-five".