1538229925 has 12 divisors (see below), whose sum is σ = 1909823076. Its totient is φ = 1229024000.

The previous prime is 1538229907. The next prime is 1538229941. The reversal of 1538229925 is 5299228351.

It can be written as a sum of positive squares in 6 ways, for example, as 282307204 + 1255922721 = 16802^2 + 35439^2 .

It is not a de Polignac number, because 1538229925 - 2⁵ = 1538229893 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 11 ways as a sum of consecutive naturals, for example, 18676 + ... + 58525.

It is an arithmetic number, because the mean of its divisors is an integer number (159151923).

Almost surely, 2^1538229925 is an apocalyptic number.

It is an amenable number.

1538229925 is a deficient number, since it is larger than the sum of its proper divisors (371593151).

1538229925 is an equidigital number, since it uses as much as digits as its factorization.

1538229925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78008 (or 78003 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The square root of 1538229925 is about 39220.2744126045. The cubic root of 1538229925 is about 1154.3577384114.

The spelling of 1538229925 in words is "one billion, five hundred thirty-eight million, two hundred twenty-nine thousand, nine hundred twenty-five".