72574551 has 24 divisors (see below), whose sum is σ = 122732064. Its totient is φ = 40458240.

The previous prime is 72574529. The next prime is 72574561. The reversal of 72574551 is 15547527.

It is not a de Polignac number, because 72574551 - 2²³ = 64185943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72574511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11466 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (5113836).

Almost surely, 2^72574551 is an apocalyptic number.

72574551 is a deficient number, since it is larger than the sum of its proper divisors (50157513).

72574551 is a wasteful number, since it uses less digits than its factorization.

72574551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28151 (or 28148 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 72574551 is about 8519.0698435921. The cubic root of 72574551 is about 417.1204213744.

The spelling of 72574551 in words is "seventy-two million, five hundred seventy-four thousand, five hundred fifty-one".