51431322 has 16 divisors (see below), whose sum is σ = 102960000. Its totient is φ = 17127552.

The previous prime is 51431293. The next prime is 51431327. The reversal of 51431322 is 22313415.

It is not an unprimeable number, because it can be changed into a prime (51431327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4063 + ... + 10925.

It is an arithmetic number, because the mean of its divisors is an integer number (6435000).

Almost surely, 2^51431322 is an apocalyptic number.

51431322 is an abundant number, since it is smaller than the sum of its proper divisors (51528678).

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

51431322 is a wasteful number, since it uses less digits than its factorization.

51431322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117.

The product of its digits is 720, while the sum is 21.

The square root of 51431322 is about 7171.5634278726. The cubic root of 51431322 is about 371.8854862001.

Adding to 51431322 its reverse (22313415), we get a palindrome (73744737).

The spelling of 51431322 in words is "fifty-one million, four hundred thirty-one thousand, three hundred twenty-two".