1625023631 has 8 divisors (see below), whose sum is σ = 2026003584. Its totient is φ = 1266252120.

The previous prime is 1625023579. The next prime is 1625023661. The reversal of 1625023631 is 1363205261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1625023631 - 2⁶ = 1625023567 is a prime.

It is a super-2 number, since 2×1625023631² = 5281403602616848322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1625023594 and 1625023603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625023661) 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 7 ways as a sum of consecutive naturals, for example, 10552025 + ... + 10552178.

It is an arithmetic number, because the mean of its divisors is an integer number (253250448).

Almost surely, 2^1625023631 is an apocalyptic number.

1625023631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1625023631 is a deficient number, since it is larger than the sum of its proper divisors (400979953).

1625023631 is a wasteful number, since it uses less digits than its factorization.

1625023631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21104221.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1625023631 is about 40311.5818469085. The cubic root of 1625023631 is about 1175.6730427445.

Adding to 1625023631 its reverse (1363205261), we get a palindrome (2988228892).

The spelling of 1625023631 in words is "one billion, six hundred twenty-five million, twenty-three thousand, six hundred thirty-one".