51001401815 has 24 divisors (see below), whose sum is σ = 76670244000. Its totient is φ = 32282203968.

The previous prime is 51001401767. The next prime is 51001401827. The reversal of 51001401815 is 51810410015.

It is not a de Polignac number, because 51001401815 - 2⁶ = 51001401751 is a prime.

It is a super-2 number, since 2×51001401815² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8003315 + ... + 8009684.

It is an arithmetic number, because the mean of its divisors is an integer number (3194593500).

Almost surely, 2^51001401815 is an apocalyptic number.

51001401815 is a deficient number, since it is larger than the sum of its proper divisors (25668842185).

51001401815 is a wasteful number, since it uses less digits than its factorization.

51001401815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16013031 (or 16013024 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 26.

The spelling of 51001401815 in words is "fifty-one billion, one million, four hundred one thousand, eight hundred fifteen".