51431222322 has 80 divisors (see below), whose sum is σ = 123890912640. Its totient is φ = 15895831392.

The previous prime is 51431222321. The next prime is 51431222351. The reversal of 51431222322 is 22322213415.

51431222322 is a `hidden beast` number, since 5 + 1 + 4 + 312 + 22 + 322 = 666.

51431222322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51431222321) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33093 + ... + 322424.

It is an arithmetic number, because the mean of its divisors is an integer number (1548636408).

Almost surely, 2^51431222322 is an apocalyptic number.

51431222322 is an abundant number, since it is smaller than the sum of its proper divisors (72459690318).

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

51431222322 is a wasteful number, since it uses less digits than its factorization.

51431222322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355597 (or 355588 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

Adding to 51431222322 its reverse (22322213415), we get a palindrome (73753435737).

The spelling of 51431222322 in words is "fifty-one billion, four hundred thirty-one million, two hundred twenty-two thousand, three hundred twenty-two".