51415131 has 8 divisors (see below), whose sum is σ = 69677584. Its totient is φ = 33714720.

The previous prime is 51415129. The next prime is 51415139. The reversal of 51415131 is 13151415.

It is a happy number.

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

It is not a de Polignac number, because 51415131 - 2¹ = 51415129 is a prime.

It is a super-2 number, since 2×51415131² = 5287031391494322, 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 = 51415098 and 51415107.

It is not an unprimeable number, because it can be changed into a prime (51415139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140296 + ... + 140661.

It is an arithmetic number, because the mean of its divisors is an integer number (8709698).

Almost surely, 2^51415131 is an apocalyptic number.

51415131 is a deficient number, since it is larger than the sum of its proper divisors (18262453).

51415131 is a wasteful number, since it uses less digits than its factorization.

51415131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281021.

The product of its digits is 300, while the sum is 21.

The square root of 51415131 is about 7170.4345056628. The cubic root of 51415131 is about 371.8464579087.

Adding to 51415131 its reverse (13151415), we get a palindrome (64566546).

The spelling of 51415131 in words is "fifty-one million, four hundred fifteen thousand, one hundred thirty-one".