242990312831 has 4 divisors (see below), whose sum is σ = 277703214672. Its totient is φ = 208277410992.

The previous prime is 242990312809. The next prime is 242990312839. The reversal of 242990312831 is 138213099242.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242990312831 - 2⁶ = 242990312767 is a prime.

It is a super-2 number, since 2×242990312831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242990312839) 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, 17356450910 + ... + 17356450923.

It is an arithmetic number, because the mean of its divisors is an integer number (69425803668).

Almost surely, 2^242990312831 is an apocalyptic number.

242990312831 is a deficient number, since it is larger than the sum of its proper divisors (34712901841).

242990312831 is an equidigital number, since it uses as much as digits as its factorization.

242990312831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34712901840.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 242990312831 in words is "two hundred forty-two billion, nine hundred ninety million, three hundred twelve thousand, eight hundred thirty-one".