51162631 has 4 divisors (see below), whose sum is σ = 55098232. Its totient is φ = 47227032.

The previous prime is 51162623. The next prime is 51162637. The reversal of 51162631 is 13626115.

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 51162631 - 2³ = 51162623 is a prime.

It is a super-2 number, since 2×51162631² = 5235229621684322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51162596 and 51162605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51162637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967781 + ... + 1967806.

It is an arithmetic number, because the mean of its divisors is an integer number (13774558).

Almost surely, 2^51162631 is an apocalyptic number.

51162631 is a deficient number, since it is larger than the sum of its proper divisors (3935601).

51162631 is a wasteful number, since it uses less digits than its factorization.

51162631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935600.

The product of its digits is 1080, while the sum is 25.

The square root of 51162631 is about 7152.8058131058. The cubic root of 51162631 is about 371.2367453615.

Adding to 51162631 its reverse (13626115), we get a palindrome (64788746).

The spelling of 51162631 in words is "fifty-one million, one hundred sixty-two thousand, six hundred thirty-one".