74531531 has 2 divisors, whose sum is σ = 74531532. Its totient is φ = 74531530.

The previous prime is 74531503. The next prime is 74531539. The reversal of 74531531 is 13513547.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74531531 - 2¹⁰ = 74530507 is a prime.

It is a super-2 number, since 2×74531531² = 11109898226407922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 74531494 and 74531503.

It is not a weakly prime, because it can be changed into another prime (74531539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37265765 + 37265766.

It is an arithmetic number, because the mean of its divisors is an integer number (37265766).

Almost surely, 2^74531531 is an apocalyptic number.

74531531 is a deficient number, since it is larger than the sum of its proper divisors (1).

74531531 is an equidigital number, since it uses as much as digits as its factorization.

74531531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 29.

The square root of 74531531 is about 8633.1645993807. The cubic root of 74531531 is about 420.8364490919.

The spelling of 74531531 in words is "seventy-four million, five hundred thirty-one thousand, five hundred thirty-one".