242815631 has 4 divisors (see below), whose sum is σ = 247397112. Its totient is φ = 238234152.

The previous prime is 242815627. The next prime is 242815633. The reversal of 242815631 is 136518242.

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

It is not a de Polignac number, because 242815631 - 2² = 242815627 is a prime.

It is a super-2 number, since 2×242815631² = 117918861315856322, which 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 (242815633) 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, 2290661 + ... + 2290766.

It is an arithmetic number, because the mean of its divisors is an integer number (61849278).

Almost surely, 2^242815631 is an apocalyptic number.

242815631 is a deficient number, since it is larger than the sum of its proper divisors (4581481).

242815631 is an equidigital number, since it uses as much as digits as its factorization.

242815631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4581480.

The product of its digits is 11520, while the sum is 32.

The square root of 242815631 is about 15582.5425075628. The cubic root of 242815631 is about 623.8672868309.

The spelling of 242815631 in words is "two hundred forty-two million, eight hundred fifteen thousand, six hundred thirty-one".