51322392 has 144 divisors (see below), whose sum is σ = 157477320. Its totient is φ = 15079680.

The previous prime is 51322387. The next prime is 51322393. The reversal of 51322392 is 29322315.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51322393) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 374548 + ... + 374684.

Almost surely, 2^51322392 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 51322392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78738660).

51322392 is an abundant number, since it is smaller than the sum of its proper divisors (106154928).

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

51322392 is a wasteful number, since it uses less digits than its factorization.

51322392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 196 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 51322392 is about 7163.9648240342. The cubic root of 51322392 is about 371.6227531843.

It can be divided in two parts, 513223 and 92, that added together give a palindrome (513315).

The spelling of 51322392 in words is "fifty-one million, three hundred twenty-two thousand, three hundred ninety-two".