51028131 has 16 divisors (see below), whose sum is σ = 84826368. Its totient is φ = 26508000.

The previous prime is 51028127. The next prime is 51028141. The reversal of 51028131 is 13182015.

It is not a de Polignac number, because 51028131 - 2² = 51028127 is a prime.

It is a super-2 number, since 2×51028131² = 5207740306706322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51028098 and 51028107.

It is not an unprimeable number, because it can be changed into a prime (51028141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110220 + ... + 110681.

It is an arithmetic number, because the mean of its divisors is an integer number (5301648).

Almost surely, 2^51028131 is an apocalyptic number.

51028131 is a deficient number, since it is larger than the sum of its proper divisors (33798237).

51028131 is a wasteful number, since it uses less digits than its factorization.

51028131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220922.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 51028131 is about 7143.3977209728. The cubic root of 51028131 is about 370.9111486017.

The spelling of 51028131 in words is "fifty-one million, twenty-eight thousand, one hundred thirty-one".