51431324 has 48 divisors (see below), whose sum is σ = 109734912. Its totient is φ = 20589312.

The previous prime is 51431293. The next prime is 51431327. The reversal of 51431324 is 42313415.

It is a self number, because there is not a number n which added to its sum of digits gives 51431324.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 79169 + ... + 79815.

It is an arithmetic number, because the mean of its divisors is an integer number (2286144).

Almost surely, 2^51431324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51431324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54867456).

51431324 is an abundant number, since it is smaller than the sum of its proper divisors (58303588).

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

51431324 is a wasteful number, since it uses less digits than its factorization.

51431324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 840 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 51431324 is about 7171.5635673122. The cubic root of 51431324 is about 371.8854910206.

Adding to 51431324 its reverse (42313415), we get a palindrome (93744739).

The spelling of 51431324 in words is "fifty-one million, four hundred thirty-one thousand, three hundred twenty-four".