242157255 has 16 divisors (see below), whose sum is σ = 387800160. Its totient is φ = 129034368.

The previous prime is 242157247. The next prime is 242157263. The reversal of 242157255 is 552751242.

It is an interprime number because it is at equal distance from previous prime (242157247) and next prime (242157263).

It is not a de Polignac number, because 242157255 - 2³ = 242157247 is a prime.

It is a super-2 number, since 2×242157255² = 117280272298270050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11541 + ... + 24849.

It is an arithmetic number, because the mean of its divisors is an integer number (24237510).

Almost surely, 2^242157255 is an apocalyptic number.

242157255 is a deficient number, since it is larger than the sum of its proper divisors (145642905).

242157255 is a wasteful number, since it uses less digits than its factorization.

242157255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14530.

The product of its digits is 28000, while the sum is 33.

The square root of 242157255 is about 15561.4027324017. The cubic root of 242157255 is about 623.3029203104.

The spelling of 242157255 in words is "two hundred forty-two million, one hundred fifty-seven thousand, two hundred fifty-five".