242531657 has 8 divisors (see below), whose sum is σ = 249422976. Its totient is φ = 235726192.

The previous prime is 242531651. The next prime is 242531699. The reversal of 242531657 is 756135242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242531657 - 2⁶ = 242531593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242531651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15713 + ... + 27054.

It is an arithmetic number, because the mean of its divisors is an integer number (31177872).

Almost surely, 2^242531657 is an apocalyptic number.

It is an amenable number.

242531657 is a deficient number, since it is larger than the sum of its proper divisors (6891319).

242531657 is a wasteful number, since it uses less digits than its factorization.

242531657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42927.

The product of its digits is 50400, while the sum is 35.

The square root of 242531657 is about 15573.4279142390. The cubic root of 242531657 is about 623.6239867366.

Adding to 242531657 its reverse (756135242), we get a palindrome (998666899).

The spelling of 242531657 in words is "two hundred forty-two million, five hundred thirty-one thousand, six hundred fifty-seven".