51234205336357 has 4 divisors (see below), whose sum is σ = 53461779481440. Its totient is φ = 49006631191276.

The previous prime is 51234205336339. The next prime is 51234205336393. The reversal of 51234205336357 is 75363350243215.

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 a de Polignac number, because none of the positive numbers 2^k-51234205336357 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 51234205336357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51234205336757) 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, 1113787072507 + ... + 1113787072552.

It is an arithmetic number, because the mean of its divisors is an integer number (13365444870360).

Almost surely, 2^{51234205336357} is an apocalyptic number.

It is an amenable number.

51234205336357 is a deficient number, since it is larger than the sum of its proper divisors (2227574145083).

51234205336357 is a wasteful number, since it uses less digits than its factorization.

51234205336357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227574145082.

The product of its (nonzero) digits is 6804000, while the sum is 49.

The spelling of 51234205336357 in words is "fifty-one trillion, two hundred thirty-four billion, two hundred five million, three hundred thirty-six thousand, three hundred fifty-seven".