51239298551 has 8 divisors (see below), whose sum is σ = 58564239360. Its totient is φ = 43915618008.

The previous prime is 51239298541. The next prime is 51239298599. The reversal of 51239298551 is 15589293215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51239298551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51239298551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51239298541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226271 + ... + 392016.

It is an arithmetic number, because the mean of its divisors is an integer number (7320529920).

Almost surely, 2^51239298551 is an apocalyptic number.

51239298551 is a deficient number, since it is larger than the sum of its proper divisors (7324940809).

51239298551 is a wasteful number, since it uses less digits than its factorization.

51239298551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630133.

The product of its digits is 972000, while the sum is 50.

The spelling of 51239298551 in words is "fifty-one billion, two hundred thirty-nine million, two hundred ninety-eight thousand, five hundred fifty-one".