242757631 has 4 divisors (see below), whose sum is σ = 246083152. Its totient is φ = 239432112.

The previous prime is 242757607. The next prime is 242757667. The reversal of 242757631 is 136757242.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 242757631 - 2¹⁵ = 242724863 is a prime.

It is a super-2 number, since 2×242757631² = 117862534817464322, 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 (242757601) 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, 1662651 + ... + 1662796.

It is an arithmetic number, because the mean of its divisors is an integer number (61520788).

Almost surely, 2^242757631 is an apocalyptic number.

242757631 is a deficient number, since it is larger than the sum of its proper divisors (3325521).

242757631 is an equidigital number, since it uses as much as digits as its factorization.

242757631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325520.

The product of its digits is 70560, while the sum is 37.

The square root of 242757631 is about 15580.6813394023. The cubic root of 242757631 is about 623.8176096555.

The spelling of 242757631 in words is "two hundred forty-two million, seven hundred fifty-seven thousand, six hundred thirty-one".