253868557 has 12 divisors (see below), whose sum is σ = 269601696. Its totient is φ = 239010120.

The previous prime is 253868539. The next prime is 253868567. The reversal of 253868557 is 755868352.

It is a happy number.

253868557 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 253868557 - 2¹⁹ = 253344269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253868557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253868567) 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, 58182 + ... + 62392.

It is an arithmetic number, because the mean of its divisors is an integer number (22466808).

Almost surely, 2^253868557 is an apocalyptic number.

It is an amenable number.

253868557 is a deficient number, since it is larger than the sum of its proper divisors (15733139).

253868557 is a wasteful number, since it uses less digits than its factorization.

253868557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416 (or 4397 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 49.

The square root of 253868557 is about 15933.2531832015. The cubic root of 253868557 is about 633.1932912585.

The spelling of 253868557 in words is "two hundred fifty-three million, eight hundred sixty-eight thousand, five hundred fifty-seven".