242190561553 has 4 divisors (see below), whose sum is σ = 242765836468. Its totient is φ = 241615286640.

The previous prime is 242190561551. The next prime is 242190561593. The reversal of 242190561553 is 355165091242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73082093569 + 169108467984 = 270337^2 + 411228^2 .

It is a cyclic number.

It is not a de Polignac number, because 242190561553 - 2¹ = 242190561551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242190561551) 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, 287636826 + ... + 287637667.

It is an arithmetic number, because the mean of its divisors is an integer number (60691459117).

Almost surely, 2^242190561553 is an apocalyptic number.

It is an amenable number.

242190561553 is a deficient number, since it is larger than the sum of its proper divisors (575274915).

242190561553 is an equidigital number, since it uses as much as digits as its factorization.

242190561553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575274914.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 242190561553 in words is "two hundred forty-two billion, one hundred ninety million, five hundred sixty-one thousand, five hundred fifty-three".