242931381 has 64 divisors (see below), whose sum is σ = 425035776. Its totient is φ = 119750400.

The previous prime is 242931373. The next prime is 242931389. The reversal of 242931381 is 183139242.

It is an interprime number because it is at equal distance from previous prime (242931373) and next prime (242931389).

It is not a de Polignac number, because 242931381 - 2³ = 242931373 is a prime.

It is a super-2 number, since 2×242931381² = 118031311749134322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242931389) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 367191 + ... + 367851.

It is an arithmetic number, because the mean of its divisors is an integer number (6641184).

Almost surely, 2^242931381 is an apocalyptic number.

242931381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242931381 is a deficient number, since it is larger than the sum of its proper divisors (182104395).

242931381 is a wasteful number, since it uses less digits than its factorization.

242931381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its digits is 10368, while the sum is 33.

The square root of 242931381 is about 15586.2561572688. The cubic root of 242931381 is about 623.9664034139.

The spelling of 242931381 in words is "two hundred forty-two million, nine hundred thirty-one thousand, three hundred eighty-one".