51131015 has 16 divisors (see below), whose sum is σ = 66473568. Its totient is φ = 37531776.

The previous prime is 51131009. The next prime is 51131021. The reversal of 51131015 is 51013115.

It is an interprime number because it is at equal distance from previous prime (51131009) and next prime (51131021).

It is a cyclic number.

It is not a de Polignac number, because 51131015 - 2¹² = 51126919 is a prime.

It is a super-2 number, since 2×51131015² = 5228761389860450, 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 = 51130984 and 51131002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8972 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (4154598).

Almost surely, 2^51131015 is an apocalyptic number.

51131015 is a deficient number, since it is larger than the sum of its proper divisors (15342553).

51131015 is a wasteful number, since it uses less digits than its factorization.

51131015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738.

The product of its (nonzero) digits is 75, while the sum is 17.

The square root of 51131015 is about 7150.5954297527. The cubic root of 51131015 is about 371.1602608963.

The spelling of 51131015 in words is "fifty-one million, one hundred thirty-one thousand, fifteen".