74322431 has 4 divisors (see below), whose sum is σ = 75044112. Its totient is φ = 73600752.

The previous prime is 74322397. The next prime is 74322481. The reversal of 74322431 is 13422347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13422347 = 307 ⋅43721.

It is a cyclic number.

It is not a de Polignac number, because 74322431 - 2¹⁴ = 74306047 is a prime.

It is a super-2 number, since 2×74322431² = 11047647499499522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74322431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74322481) 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, 360686 + ... + 360891.

It is an arithmetic number, because the mean of its divisors is an integer number (18761028).

Almost surely, 2^74322431 is an apocalyptic number.

74322431 is a deficient number, since it is larger than the sum of its proper divisors (721681).

74322431 is a wasteful number, since it uses less digits than its factorization.

74322431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721680.

The product of its digits is 4032, while the sum is 26.

The square root of 74322431 is about 8621.0458182288. The cubic root of 74322431 is about 420.4425248861.

Adding to 74322431 its reverse (13422347), we get a palindrome (87744778).

The spelling of 74322431 in words is "seventy-four million, three hundred twenty-two thousand, four hundred thirty-one".