51908424 has 64 divisors (see below), whose sum is σ = 136304640. Its totient is φ = 16441920.

The previous prime is 51908411. The next prime is 51908431. The reversal of 51908424 is 42480915.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149419 + ... + 149765.

It is an arithmetic number, because the mean of its divisors is an integer number (2129760).

Almost surely, 2^51908424 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 51908424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68152320).

51908424 is an abundant number, since it is smaller than the sum of its proper divisors (84396216).

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

51908424 is a wasteful number, since it uses less digits than its factorization.

51908424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 51908424 is about 7204.7500997606. The cubic root of 51908424 is about 373.0318789583.

The spelling of 51908424 in words is "fifty-one million, nine hundred eight thousand, four hundred twenty-four".