74312131 has 8 divisors (see below), whose sum is σ = 76868064. Its totient is φ = 71791680.

The previous prime is 74312129. The next prime is 74312159. The reversal of 74312131 is 13121347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74312131 - 2¹ = 74312129 is a prime.

It is a super-2 number, since 2×74312131² = 11044585627522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74312171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4576 + ... + 13021.

It is an arithmetic number, because the mean of its divisors is an integer number (9608508).

Almost surely, 2^74312131 is an apocalyptic number.

74312131 is a deficient number, since it is larger than the sum of its proper divisors (2555933).

74312131 is a wasteful number, since it uses less digits than its factorization.

74312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17741.

The product of its digits is 504, while the sum is 22.

The square root of 74312131 is about 8620.4484222110. The cubic root of 74312131 is about 420.4231015975.

Adding to 74312131 its reverse (13121347), we get a palindrome (87433478).

The spelling of 74312131 in words is "seventy-four million, three hundred twelve thousand, one hundred thirty-one".