51005015 has 16 divisors (see below), whose sum is σ = 64984032. Its totient is φ = 38298624.

The previous prime is 51004979. The next prime is 51005021. The reversal of 51005015 is 51050015.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51005015 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51004984 and 51005002.

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, 45947 + ... + 47043.

It is an arithmetic number, because the mean of its divisors is an integer number (4061502).

Almost surely, 2^51005015 is an apocalyptic number.

51005015 is a deficient number, since it is larger than the sum of its proper divisors (13979017).

51005015 is a wasteful number, since it uses less digits than its factorization.

51005015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 51005015 is about 7141.7795401426. The cubic root of 51005015 is about 370.8551319369.

The spelling of 51005015 in words is "fifty-one million, five thousand, fifteen".