242402553 has 6 divisors (see below), whose sum is σ = 350137034. Its totient is φ = 161601696.

The previous prime is 242402539. The next prime is 242402557. The reversal of 242402553 is 355204242.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 239259024 + 3143529 = 15468^2 + 1773^2 .

It is not a de Polignac number, because 242402553 - 2⁵ = 242402521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242402557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13466800 + ... + 13466817.

Almost surely, 2^242402553 is an apocalyptic number.

It is an amenable number.

242402553 is a deficient number, since it is larger than the sum of its proper divisors (107734481).

242402553 is a wasteful number, since it uses less digits than its factorization.

242402553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26933623 (or 26933620 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 242402553 is about 15569.2823534034. The cubic root of 242402553 is about 623.5133116430.

Adding to 242402553 its reverse (355204242), we get a palindrome (597606795).

The spelling of 242402553 in words is "two hundred forty-two million, four hundred two thousand, five hundred fifty-three".