51625472 has 40 divisors (see below), whose sum is σ = 104959800. Its totient is φ = 25360384.

The previous prime is 51625463. The next prime is 51625477. The reversal of 51625472 is 27452615.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51625477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29354 + ... + 31062.

It is an arithmetic number, because the mean of its divisors is an integer number (2623995).

Almost surely, 2^51625472 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 51625472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52479900).

51625472 is an abundant number, since it is smaller than the sum of its proper divisors (53334328).

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

51625472 is an equidigital number, since it uses as much as digits as its factorization.

51625472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1770 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 51625472 is about 7185.0867774857. The cubic root of 51625472 is about 372.3528467000.

The spelling of 51625472 in words is "fifty-one million, six hundred twenty-five thousand, four hundred seventy-two".