53725551 has 16 divisors (see below), whose sum is σ = 78394368. Its totient is φ = 32457600.

The previous prime is 53725547. The next prime is 53725583. The reversal of 53725551 is 15552735.

It is not a de Polignac number, because 53725551 - 2² = 53725547 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53725501) 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, 8706 + ... + 13536.

It is an arithmetic number, because the mean of its divisors is an integer number (4899648).

Almost surely, 2^53725551 is an apocalyptic number.

53725551 is a deficient number, since it is larger than the sum of its proper divisors (24668817).

53725551 is a wasteful number, since it uses less digits than its factorization.

53725551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5182.

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

The square root of 53725551 is about 7329.7715516925. The cubic root of 53725551 is about 377.3348862001.

The spelling of 53725551 in words is "fifty-three million, seven hundred twenty-five thousand, five hundred fifty-one".