3129990225 has 48 divisors (see below), whose sum is σ = 5315284800. Its totient is φ = 1624268800.

The previous prime is 3129990221. The next prime is 3129990229. The reversal of 3129990225 is 5220999213.

It is an interprime number because it is at equal distance from previous prime (3129990221) and next prime (3129990229).

It is not a de Polignac number, because 3129990225 - 2² = 3129990221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3129990221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1379542 + ... + 1381808.

It is an arithmetic number, because the mean of its divisors is an integer number (110735100).

Almost surely, 2^3129990225 is an apocalyptic number.

It is an amenable number.

3129990225 is a deficient number, since it is larger than the sum of its proper divisors (2185294575).

3129990225 is a wasteful number, since it uses less digits than its factorization.

3129990225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2765 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 3129990225 is about 55946.3155623317. The cubic root of 3129990225 is about 1462.7866689133.

The spelling of 3129990225 in words is "three billion, one hundred twenty-nine million, nine hundred ninety thousand, two hundred twenty-five".