51492639 has 12 divisors (see below), whose sum is σ = 75466328. Its totient is φ = 31207440.

The previous prime is 51492611. The next prime is 51492647. The reversal of 51492639 is 93629415.

It is not a de Polignac number, because 51492639 - 2⁹ = 51492127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51492597 and 51492606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51492659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70564 + ... + 71289.

Almost surely, 2^51492639 is an apocalyptic number.

51492639 is a deficient number, since it is larger than the sum of its proper divisors (23973689).

51492639 is a wasteful number, since it uses less digits than its factorization.

51492639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141878 (or 141867 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 51492639 is about 7175.8371637043. The cubic root of 51492639 is about 372.0332161923.

The spelling of 51492639 in words is "fifty-one million, four hundred ninety-two thousand, six hundred thirty-nine".