51504333397 has 4 divisors (see below), whose sum is σ = 56186545536. Its totient is φ = 46822121260.

The previous prime is 51504333347. The next prime is 51504333401. The reversal of 51504333397 is 79333340515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51504333397 - 2¹¹ = 51504331349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504333337) 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, 2341106053 + ... + 2341106074.

It is an arithmetic number, because the mean of its divisors is an integer number (14046636384).

Almost surely, 2^51504333397 is an apocalyptic number.

It is an amenable number.

51504333397 is a deficient number, since it is larger than the sum of its proper divisors (4682212139).

51504333397 is a wasteful number, since it uses less digits than its factorization.

51504333397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682212138.

The product of its (nonzero) digits is 510300, while the sum is 43.

The spelling of 51504333397 in words is "fifty-one billion, five hundred four million, three hundred thirty-three thousand, three hundred ninety-seven".