51620300051 has 4 divisors (see below), whose sum is σ = 51633813504. Its totient is φ = 51606786600.

The previous prime is 51620300027. The next prime is 51620300057. The reversal of 51620300051 is 15000302615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51620300051 - 2¹⁸ = 51620037907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51620300057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6750995 + ... + 6758636.

It is an arithmetic number, because the mean of its divisors is an integer number (12908453376).

Almost surely, 2^51620300051 is an apocalyptic number.

51620300051 is a deficient number, since it is larger than the sum of its proper divisors (13513453).

51620300051 is a wasteful number, since it uses less digits than its factorization.

51620300051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13513452.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 51620300051 its reverse (15000302615), we get a palindrome (66620602666).

The spelling of 51620300051 in words is "fifty-one billion, six hundred twenty million, three hundred thousand, fifty-one".