51420131 has 16 divisors (see below), whose sum is σ = 60614400. Its totient is φ = 42704928.

The previous prime is 51420119. The next prime is 51420139. The reversal of 51420131 is 13102415.

51420131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51420131 is a prime.

It is a super-2 number, since 2×51420131² = 5288059744114322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51420139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41225 + ... + 42453.

It is an arithmetic number, because the mean of its divisors is an integer number (3788400).

Almost surely, 2^51420131 is an apocalyptic number.

51420131 is a deficient number, since it is larger than the sum of its proper divisors (9194269).

51420131 is a wasteful number, since it uses less digits than its factorization.

51420131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51420131 is about 7170.7831510931. The cubic root of 51420131 is about 371.8585112478.

Adding to 51420131 its reverse (13102415), we get a palindrome (64522546).

The spelling of 51420131 in words is "fifty-one million, four hundred twenty thousand, one hundred thirty-one".