8137423225 has 12 divisors (see below), whose sum is σ = 10092263404. Its totient is φ = 6508739520.

The previous prime is 8137423219. The next prime is 8137423237. The reversal of 8137423225 is 5223247318.

It can be written as a sum of positive squares in 6 ways, for example, as 2253305961 + 5884117264 = 47469^2 + 76708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8137423225 is a prime.

It is a Duffinian 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, 123967 + ... + 177883.

Almost surely, 2^8137423225 is an apocalyptic number.

It is an amenable number.

8137423225 is a deficient number, since it is larger than the sum of its proper divisors (1954840179).

8137423225 is a wasteful number, since it uses less digits than its factorization.

8137423225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59964 (or 59959 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 8137423225 is about 90207.6672184798. The cubic root of 8137423225 is about 2011.3869807123.

The spelling of 8137423225 in words is "eight billion, one hundred thirty-seven million, four hundred twenty-three thousand, two hundred twenty-five".