51344310306421 has 4 divisors (see below), whose sum is σ = 56011974879744. Its totient is φ = 46676645733100.

The previous prime is 51344310306409. The next prime is 51344310306427. The reversal of 51344310306421 is 12460301344315.

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 51344310306421 - 2²¹ = 51344308209269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51344310306427) 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, 2333832286645 + ... + 2333832286666.

It is an arithmetic number, because the mean of its divisors is an integer number (14002993719936).

Almost surely, 2^{51344310306421} is an apocalyptic number.

It is an amenable number.

51344310306421 is a deficient number, since it is larger than the sum of its proper divisors (4667664573323).

51344310306421 is a wasteful number, since it uses less digits than its factorization.

51344310306421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667664573322.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 51344310306421 in words is "fifty-one trillion, three hundred forty-four billion, three hundred ten million, three hundred six thousand, four hundred twenty-one".