51251015 has 16 divisors (see below), whose sum is σ = 64663488. Its totient is φ = 38919936.

The previous prime is 51250987. The next prime is 51251023. The reversal of 51251015 is 51015215.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51251015 - 2⁶ = 51250951 is a prime.

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, 14129 + ... + 17381.

It is an arithmetic number, because the mean of its divisors is an integer number (4041468).

Almost surely, 2^51251015 is an apocalyptic number.

51251015 is a deficient number, since it is larger than the sum of its proper divisors (13412473).

51251015 is a wasteful number, since it uses less digits than its factorization.

51251015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 51251015 is about 7158.9814219622. The cubic root of 51251015 is about 371.4503942165.

The spelling of 51251015 in words is "fifty-one million, two hundred fifty-one thousand, fifteen".