51132015 has 48 divisors (see below), whose sum is σ = 98560800. Its totient is φ = 24311040.

The previous prime is 51132007. The next prime is 51132019. The reversal of 51132015 is 51023115.

It is not a de Polignac number, because 51132015 - 2³ = 51132007 is a prime.

It is a super-2 number, since 2×51132015² = 5228965915920450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25261 + ... + 27209.

It is an arithmetic number, because the mean of its divisors is an integer number (2053350).

Almost surely, 2^51132015 is an apocalyptic number.

51132015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51132015 is a deficient number, since it is larger than the sum of its proper divisors (47428785).

51132015 is a wasteful number, since it uses less digits than its factorization.

51132015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51132015 is about 7150.6653536577. The cubic root of 51132015 is about 371.1626805487.

Subtracting from 51132015 its reverse (51023115), we obtain a square (108900 = 330²).

The spelling of 51132015 in words is "fifty-one million, one hundred thirty-two thousand, fifteen".