1625229631 has 4 divisors (see below), whose sum is σ = 1720831392. Its totient is φ = 1529627872.

The previous prime is 1625229539. The next prime is 1625229637. The reversal of 1625229631 is 1369225261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1625229631 - 2⁷ = 1625229503 is a prime.

It is a super-2 number, since 2×1625229631² = 5282742706960792322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625229637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47800855 + ... + 47800888.

It is an arithmetic number, because the mean of its divisors is an integer number (430207848).

Almost surely, 2^1625229631 is an apocalyptic number.

1625229631 is a deficient number, since it is larger than the sum of its proper divisors (95601761).

1625229631 is an equidigital number, since it uses as much as digits as its factorization.

1625229631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95601760.

The product of its digits is 38880, while the sum is 37.

The square root of 1625229631 is about 40314.1368628922. The cubic root of 1625229631 is about 1175.7227196455.

The spelling of 1625229631 in words is "one billion, six hundred twenty-five million, two hundred twenty-nine thousand, six hundred thirty-one".