51395131 has 8 divisors (see below), whose sum is σ = 54722304. Its totient is φ = 48101760.

The previous prime is 51395129. The next prime is 51395173. The reversal of 51395131 is 13159315.

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

It is a cyclic number.

It is not a de Polignac number, because 51395131 - 2¹ = 51395129 is a prime.

It is a super-2 number, since 2×51395131² = 5282918981014322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51395131.

It is not an unprimeable number, because it can be changed into a prime (51395831) 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, 5275 + ... + 11428.

It is an arithmetic number, because the mean of its divisors is an integer number (6840288).

Almost surely, 2^51395131 is an apocalyptic number.

51395131 is a deficient number, since it is larger than the sum of its proper divisors (3327173).

51395131 is a wasteful number, since it uses less digits than its factorization.

51395131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16901.

The product of its digits is 2025, while the sum is 28.

The square root of 51395131 is about 7169.0397543883. The cubic root of 51395131 is about 371.7982367365.

The spelling of 51395131 in words is "fifty-one million, three hundred ninety-five thousand, one hundred thirty-one".