242248557 has 4 divisors (see below), whose sum is σ = 322998080. Its totient is φ = 161499036.

The previous prime is 242248553. The next prime is 242248561. The reversal of 242248557 is 755842242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (242248553) and next prime (242248561).

It is not a de Polignac number, because 242248557 - 2² = 242248553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242248553) 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, 40374757 + ... + 40374762.

It is an arithmetic number, because the mean of its divisors is an integer number (80749520).

Almost surely, 2^242248557 is an apocalyptic number.

It is an amenable number.

242248557 is a deficient number, since it is larger than the sum of its proper divisors (80749523).

242248557 is an equidigital number, since it uses as much as digits as its factorization.

242248557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80749522.

The product of its digits is 179200, while the sum is 39.

The square root of 242248557 is about 15564.3360603657. The cubic root of 242248557 is about 623.3812463448.

The spelling of 242248557 in words is "two hundred forty-two million, two hundred forty-eight thousand, five hundred fifty-seven".