74563231 has 4 divisors (see below), whose sum is σ = 74872864. Its totient is φ = 74253600.

The previous prime is 74563219. The next prime is 74563249. The reversal of 74563231 is 13236547.

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

It is a cyclic number.

It is not a de Polignac number, because 74563231 - 2²³ = 66174623 is a prime.

It is a super-2 number, since 2×74563231² = 11119350834318722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74563193 and 74563202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74563261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154455 + ... + 154936.

It is an arithmetic number, because the mean of its divisors is an integer number (18718216).

Almost surely, 2^74563231 is an apocalyptic number.

74563231 is a deficient number, since it is larger than the sum of its proper divisors (309633).

74563231 is a wasteful number, since it uses less digits than its factorization.

74563231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309632.

The product of its digits is 15120, while the sum is 31.

The square root of 74563231 is about 8635.0003474233. Note that the first 3 decimals coincide. The cubic root of 74563231 is about 420.8961044904.

Adding to 74563231 its reverse (13236547), we get a palindrome (87799778).

The spelling of 74563231 in words is "seventy-four million, five hundred sixty-three thousand, two hundred thirty-one".