1625641331 has 2 divisors, whose sum is σ = 1625641332. Its totient is φ = 1625641330.

The previous prime is 1625641321. The next prime is 1625641379. The reversal of 1625641331 is 1331465261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1625641331 - 2³⁰ = 551899507 is a prime.

It is a super-2 number, since 2×1625641331² = 5285419474110903122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1625641321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812820665 + 812820666.

It is an arithmetic number, because the mean of its divisors is an integer number (812820666).

Almost surely, 2^1625641331 is an apocalyptic number.

1625641331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625641331 is an equidigital number, since it uses as much as digits as its factorization.

1625641331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 1625641331 is about 40319.2426888204. The cubic root of 1625641331 is about 1175.8219885257.

The spelling of 1625641331 in words is "one billion, six hundred twenty-five million, six hundred forty-one thousand, three hundred thirty-one".