51433920 has 112 divisors (see below), whose sum is σ = 181477920. Its totient is φ = 13713408.

The previous prime is 51433913. The next prime is 51433981. The reversal of 51433920 is 2933415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 5664 + ... + 11616.

Almost surely, 2^51433920 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 51433920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90738960).

51433920 is an abundant number, since it is smaller than the sum of its proper divisors (130044000).

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

51433920 is a wasteful number, since it uses less digits than its factorization.

51433920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979 (or 5963 counting only the distinct ones).

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

The square root of 51433920 is about 7171.7445576373. The cubic root of 51433920 is about 371.8917478981.

The spelling of 51433920 in words is "fifty-one million, four hundred thirty-three thousand, nine hundred twenty".