242919831 has 16 divisors (see below), whose sum is σ = 403815168. Its totient is φ = 126192000.

The previous prime is 242919821. The next prime is 242919841. The reversal of 242919831 is 138919242.

It is an interprime number because it is at equal distance from previous prime (242919821) and next prime (242919841).

It is not a de Polignac number, because 242919831 - 2⁵ = 242919799 is a prime.

It is a super-2 number, since 2×242919831² = 118020088586137122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242919831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242919811) 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, 525570 + ... + 526031.

It is an arithmetic number, because the mean of its divisors is an integer number (25238448).

Almost surely, 2^242919831 is an apocalyptic number.

242919831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242919831 is a deficient number, since it is larger than the sum of its proper divisors (160895337).

242919831 is a wasteful number, since it uses less digits than its factorization.

242919831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051622.

The product of its digits is 31104, while the sum is 39.

The square root of 242919831 is about 15585.8856341242. The cubic root of 242919831 is about 623.9565145773.

The spelling of 242919831 in words is "two hundred forty-two million, nine hundred nineteen thousand, eight hundred thirty-one".