74225557 has 4 divisors (see below), whose sum is σ = 84829216. Its totient is φ = 63621900.

The previous prime is 74225551. The next prime is 74225561. The reversal of 74225557 is 75552247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74225557 - 2⁷ = 74225429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74225551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5301819 + ... + 5301832.

It is an arithmetic number, because the mean of its divisors is an integer number (21207304).

Almost surely, 2^74225557 is an apocalyptic number.

It is an amenable number.

74225557 is a deficient number, since it is larger than the sum of its proper divisors (10603659).

74225557 is a wasteful number, since it uses less digits than its factorization.

74225557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10603658.

The product of its digits is 98000, while the sum is 37.

The square root of 74225557 is about 8615.4255263452. The cubic root of 74225557 is about 420.2597731577.

The spelling of 74225557 in words is "seventy-four million, two hundred twenty-five thousand, five hundred fifty-seven".