51306822492 has 12 divisors (see below), whose sum is σ = 119715919176. Its totient is φ = 17102274160.

The previous prime is 51306822491. The next prime is 51306822493. The reversal of 51306822492 is 29422860315.

It is an interprime number because it is at equal distance from previous prime (51306822491) and next prime (51306822493).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306822491) 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, 2137784259 + ... + 2137784282.

It is an arithmetic number, because the mean of its divisors is an integer number (9976326598).

Almost surely, 2^51306822492 is an apocalyptic number.

It is an amenable number.

51306822492 is an abundant number, since it is smaller than the sum of its proper divisors (68409096684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51306822492 is a wasteful number, since it uses less digits than its factorization.

51306822492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275568548 (or 4275568546 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 51306822492 in words is "fifty-one billion, three hundred six million, eight hundred twenty-two thousand, four hundred ninety-two".