51725553 has 16 divisors (see below), whose sum is σ = 75389376. Its totient is φ = 31285440.

The previous prime is 51725549. The next prime is 51725561. The reversal of 51725553 is 35552715.

It is not a de Polignac number, because 51725553 - 2² = 51725549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51725563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18951 + ... + 21507.

It is an arithmetic number, because the mean of its divisors is an integer number (4711836).

Almost surely, 2^51725553 is an apocalyptic number.

It is an amenable number.

51725553 is a deficient number, since it is larger than the sum of its proper divisors (23663823).

51725553 is a wasteful number, since it uses less digits than its factorization.

51725553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184.

The product of its digits is 26250, while the sum is 33.

The square root of 51725553 is about 7192.0479002854. The cubic root of 51725553 is about 372.5933054555.

The spelling of 51725553 in words is "fifty-one million, seven hundred twenty-five thousand, five hundred fifty-three".