242557889 has 12 divisors (see below), whose sum is σ = 286374384. Its totient is φ = 204800904.

The previous prime is 242557879. The next prime is 242557901. The reversal of 242557889 is 988755242.

242557889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242557889 - 2⁸ = 242557633 is a prime.

It is a super-2 number, since 2×242557889² = 117668659032272642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242557849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33659 + ... + 40224.

It is an arithmetic number, because the mean of its divisors is an integer number (23864532).

Almost surely, 2^242557889 is an apocalyptic number.

It is an amenable number.

242557889 is a deficient number, since it is larger than the sum of its proper divisors (43816495).

242557889 is an equidigital number, since it uses as much as digits as its factorization.

242557889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73964 (or 73957 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 242557889 is about 15574.2700952565. The cubic root of 242557889 is about 623.6464694575.

The spelling of 242557889 in words is "two hundred forty-two million, five hundred fifty-seven thousand, eight hundred eighty-nine".