242166931 has 4 divisors (see below), whose sum is σ = 252695952. Its totient is φ = 231637912.

The previous prime is 242166929. The next prime is 242166937. The reversal of 242166931 is 139661242.

It is a happy number.

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 242166931 - 2¹ = 242166929 is a prime.

It is a super-2 number, since 2×242166931² = 117289644939917522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242166937) 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, 5264476 + ... + 5264521.

It is an arithmetic number, because the mean of its divisors is an integer number (63173988).

Almost surely, 2^242166931 is an apocalyptic number.

242166931 is a deficient number, since it is larger than the sum of its proper divisors (10529021).

242166931 is a wasteful number, since it uses less digits than its factorization.

242166931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10529020.

The product of its digits is 15552, while the sum is 34.

The square root of 242166931 is about 15561.7136267186. The cubic root of 242166931 is about 623.3112220765.

The spelling of 242166931 in words is "two hundred forty-two million, one hundred sixty-six thousand, nine hundred thirty-one".