51001015 has 16 divisors (see below), whose sum is σ = 66534048. Its totient is φ = 37305216.

The previous prime is 51001009. The next prime is 51001031. The reversal of 51001015 is 51010015.

It is not a de Polignac number, because 51001015 - 2¹⁷ = 50869943 is a prime.

It is a super-2 number, since 2×51001015² = 5202207062060450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51000986 and 51001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3289 + ... + 10621.

It is an arithmetic number, because the mean of its divisors is an integer number (4158378).

Almost surely, 2^51001015 is an apocalyptic number.

51001015 is a deficient number, since it is larger than the sum of its proper divisors (15533033).

51001015 is a wasteful number, since it uses less digits than its factorization.

51001015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 51001015 is about 7141.4994924035. The cubic root of 51001015 is about 370.8454370778.

The spelling of 51001015 in words is "fifty-one million, one thousand, fifteen".