51925440 has 112 divisors (see below), whose sum is σ = 188439552. Its totient is φ = 11867136.

The previous prime is 51925439. The next prime is 51925453. The reversal of 51925440 is 4452915.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51925398 and 51925407.

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, 2857 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (1682496).

Almost surely, 2^51925440 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 51925440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94219776).

51925440 is an abundant number, since it is smaller than the sum of its proper divisors (136514112).

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

51925440 is a wasteful number, since it uses less digits than its factorization.

51925440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7754 (or 7744 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51925440 is about 7205.9308905928. The cubic root of 51925440 is about 373.0726354579.

The spelling of 51925440 in words is "fifty-one million, nine hundred twenty-five thousand, four hundred forty".