242190655 has 32 divisors (see below), whose sum is σ = 341241984. Its totient is φ = 161581056.

The previous prime is 242190647. The next prime is 242190659. The reversal of 242190655 is 556091242.

It is a happy number.

It is not a de Polignac number, because 242190655 - 2³ = 242190647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242190655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242190659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253659 + ... + 254611.

It is an arithmetic number, because the mean of its divisors is an integer number (10663812).

Almost surely, 2^242190655 is an apocalyptic number.

242190655 is a deficient number, since it is larger than the sum of its proper divisors (99051329).

242190655 is a wasteful number, since it uses less digits than its factorization.

242190655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 242190655 is about 15562.4758634351. The cubic root of 242190655 is about 623.3315757399.

The spelling of 242190655 in words is "two hundred forty-two million, one hundred ninety thousand, six hundred fifty-five".