74228531 has 4 divisors (see below), whose sum is σ = 79938432. Its totient is φ = 68518632.

The previous prime is 74228527. The next prime is 74228537. The reversal of 74228531 is 13582247.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74228531 - 2² = 74228527 is a prime.

It is a super-2 number, since 2×74228531² = 11019749628835922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74228537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854931 + ... + 2854956.

It is an arithmetic number, because the mean of its divisors is an integer number (19984608).

Almost surely, 2^74228531 is an apocalyptic number.

74228531 is a deficient number, since it is larger than the sum of its proper divisors (5709901).

74228531 is a wasteful number, since it uses less digits than its factorization.

74228531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5709900.

The product of its digits is 13440, while the sum is 32.

The square root of 74228531 is about 8615.5981220110. The cubic root of 74228531 is about 420.2653859408.

The spelling of 74228531 in words is "seventy-four million, two hundred twenty-eight thousand, five hundred thirty-one".