51020264997 has 24 divisors (see below), whose sum is σ = 81509859704. Its totient is φ = 30548513664.

The previous prime is 51020264963. The next prime is 51020265001. The reversal of 51020264997 is 79946202015.

51020264997 is a `hidden beast` number, since 510 + 2 + 0 + 2 + 6 + 49 + 97 = 666.

51020264997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 66683556 + 50953581441 = 8166^2 + 225729^2 .

It is not a de Polignac number, because 51020264997 - 2¹⁴ = 51020248613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020260997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5888518 + ... + 5897175.

Almost surely, 2^51020264997 is an apocalyptic number.

It is an amenable number.

51020264997 is a deficient number, since it is larger than the sum of its proper divisors (30489594707).

51020264997 is a wasteful number, since it uses less digits than its factorization.

51020264997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11785749 (or 11785746 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 51020264997 in words is "fifty-one billion, twenty million, two hundred sixty-four thousand, nine hundred ninety-seven".