51913392 has 80 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 16251136.

The previous prime is 51913387. The next prime is 51913397. The reversal of 51913392 is 29331915.

It is an interprime number because it is at equal distance from previous prime (51913387) and next prime (51913397).

It is not an unprimeable number, because it can be changed into a prime (51913397) 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, 64738 + ... + 65534.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^51913392 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 51913392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71245440).

51913392 is an abundant number, since it is smaller than the sum of its proper divisors (90577488).

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

51913392 is a wasteful number, since it uses less digits than its factorization.

51913392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 884 counting only the distinct ones).

The product of its digits is 7290, while the sum is 33.

The square root of 51913392 is about 7205.0948640528. The cubic root of 51913392 is about 373.0437791671.

The spelling of 51913392 in words is "fifty-one million, nine hundred thirteen thousand, three hundred ninety-two".