51631122 has 8 divisors (see below), whose sum is σ = 103262256. Its totient is φ = 17210372.

The previous prime is 51631061. The next prime is 51631127. The reversal of 51631122 is 22113615.

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

51631122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51631127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4302588 + ... + 4302599.

It is an arithmetic number, because the mean of its divisors is an integer number (12907782).

Almost surely, 2^51631122 is an apocalyptic number.

51631122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51631122 is a wasteful number, since it uses less digits than its factorization.

51631122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8605192.

The product of its digits is 360, while the sum is 21.

The square root of 51631122 is about 7185.4799422168. The cubic root of 51631122 is about 372.3664298968.

Adding to 51631122 its reverse (22113615), we get a palindrome (73744737).

The spelling of 51631122 in words is "fifty-one million, six hundred thirty-one thousand, one hundred twenty-two".