242957931 has 16 divisors (see below), whose sum is σ = 343357344. Its totient is φ = 152285184.

The previous prime is 242957927. The next prime is 242957951. The reversal of 242957931 is 139759242.

It is not a de Polignac number, because 242957931 - 2² = 242957927 is a prime.

It is a super-2 number, since 2×242957931² = 118057112471601522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242957951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64311 + ... + 67983.

It is an arithmetic number, because the mean of its divisors is an integer number (21459834).

Almost surely, 2^242957931 is an apocalyptic number.

242957931 is a deficient number, since it is larger than the sum of its proper divisors (100399413).

242957931 is a wasteful number, since it uses less digits than its factorization.

242957931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990.

The product of its digits is 136080, while the sum is 42.

The square root of 242957931 is about 15587.1078459091. The cubic root of 242957931 is about 623.9891337071.

The spelling of 242957931 in words is "two hundred forty-two million, nine hundred fifty-seven thousand, nine hundred thirty-one".