51631022 has 4 divisors (see below), whose sum is σ = 77446536. Its totient is φ = 25815510.

The previous prime is 51631009. The next prime is 51631039. The reversal of 51631022 is 22013615.

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

It is a junction number, because it is equal to n+sod(n) for n = 51630985 and 51631003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12907754 + ... + 12907757.

It is an arithmetic number, because the mean of its divisors is an integer number (19361634).

Almost surely, 2^51631022 is an apocalyptic number.

51631022 is a deficient number, since it is larger than the sum of its proper divisors (25815514).

51631022 is a wasteful number, since it uses less digits than its factorization.

51631022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25815513.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51631022 is about 7185.4729837360. The cubic root of 51631022 is about 372.3661894948.

Adding to 51631022 its reverse (22013615), we get a palindrome (73644637).

The spelling of 51631022 in words is "fifty-one million, six hundred thirty-one thousand, twenty-two".