253238017885 has 4 divisors (see below), whose sum is σ = 303885621468. Its totient is φ = 202590414304.

The previous prime is 253238017883. The next prime is 253238017913. The reversal of 253238017885 is 588710832352.

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 62214826041 + 191023191844 = 249429^2 + 437062^2 .

It is a cyclic number.

It is not a de Polignac number, because 253238017885 - 2¹ = 253238017883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253238017883) 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, 25323801784 + ... + 25323801793.

It is an arithmetic number, because the mean of its divisors is an integer number (75971405367).

Almost surely, 2^253238017885 is an apocalyptic number.

It is an amenable number.

253238017885 is a deficient number, since it is larger than the sum of its proper divisors (50647603583).

253238017885 is an equidigital number, since it uses as much as digits as its factorization.

253238017885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50647603582.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 253238017885 in words is "two hundred fifty-three billion, two hundred thirty-eight million, seventeen thousand, eight hundred eighty-five".