74223731 has 4 divisors (see below), whose sum is σ = 76783200. Its totient is φ = 71664264.

The previous prime is 74223713. The next prime is 74223749. The reversal of 74223731 is 13732247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13732247 = 53 ⋅259099.

It is an interprime number because it is at equal distance from previous prime (74223713) and next prime (74223749).

It is a cyclic number.

It is not a de Polignac number, because 74223731 - 2²⁶ = 7114867 is a prime.

It is a super-2 number, since 2×74223731² = 11018324487120722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2559439 = 74223731 / (7 + 4 + 2 + 2 + 3 + 7 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74223694 and 74223703.

It is not an unprimeable number, because it can be changed into a prime (74223431) 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, 1279691 + ... + 1279748.

It is an arithmetic number, because the mean of its divisors is an integer number (19195800).

Almost surely, 2^74223731 is an apocalyptic number.

74223731 is a deficient number, since it is larger than the sum of its proper divisors (2559469).

74223731 is a wasteful number, since it uses less digits than its factorization.

74223731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559468.

The product of its digits is 7056, while the sum is 29.

The square root of 74223731 is about 8615.3195529824. The cubic root of 74223731 is about 420.2563269024.

Adding to 74223731 its reverse (13732247), we get a palindrome (87955978).

The spelling of 74223731 in words is "seventy-four million, two hundred twenty-three thousand, seven hundred thirty-one".