74551631 has 16 divisors (see below), whose sum is σ = 93143040. Its totient is φ = 57970080.

The previous prime is 74551627. The next prime is 74551643. The reversal of 74551631 is 13615547.

It is not a de Polignac number, because 74551631 - 2² = 74551627 is a prime.

It is a super-2 number, since 2×74551631² = 11115891369520322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74551601) 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 15 ways as a sum of consecutive naturals, for example, 57650 + ... + 58928.

It is an arithmetic number, because the mean of its divisors is an integer number (5821440).

Almost surely, 2^74551631 is an apocalyptic number.

74551631 is a deficient number, since it is larger than the sum of its proper divisors (18591409).

74551631 is a wasteful number, since it uses less digits than its factorization.

74551631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054.

The product of its digits is 12600, while the sum is 32.

The square root of 74551631 is about 8634.3286363214. The cubic root of 74551631 is about 420.8742767166.

It can be divided in two parts, 745516 and 31, that added together give a palindrome (745547).

The spelling of 74551631 in words is "seventy-four million, five hundred fifty-one thousand, six hundred thirty-one".