51725390 has 32 divisors (see below), whose sum is σ = 102876480. Its totient is φ = 18625024.

The previous prime is 51725383. The next prime is 51725393. The reversal of 51725390 is 9352715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51725393) 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 15 ways as a sum of consecutive naturals, for example, 2705 + ... + 10524.

It is an arithmetic number, because the mean of its divisors is an integer number (3214890).

Almost surely, 2^51725390 is an apocalyptic number.

51725390 is a deficient number, since it is larger than the sum of its proper divisors (51151090).

51725390 is a wasteful number, since it uses less digits than its factorization.

51725390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 51725390 is about 7192.0365683164. The cubic root of 51725390 is about 372.5929140772.

The spelling of 51725390 in words is "fifty-one million, seven hundred twenty-five thousand, three hundred ninety".