242308731 has 16 divisors (see below), whose sum is σ = 370289664. Its totient is φ = 138065664.

The previous prime is 242308727. The next prime is 242308733. The reversal of 242308731 is 137803242.

It is not a de Polignac number, because 242308731 - 2² = 242308727 is a prime.

It is a super-2 number, since 2×242308731² = 117427042237660722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242308733) 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 15 ways as a sum of consecutive naturals, for example, 8931 + ... + 23756.

It is an arithmetic number, because the mean of its divisors is an integer number (23143104).

Almost surely, 2^242308731 is an apocalyptic number.

242308731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242308731 is a deficient number, since it is larger than the sum of its proper divisors (127980933).

242308731 is a wasteful number, since it uses less digits than its factorization.

242308731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33050.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 242308731 is about 15566.2690134791. The cubic root of 242308731 is about 623.4328575744.

The spelling of 242308731 in words is "two hundred forty-two million, three hundred eight thousand, seven hundred thirty-one".