253986340221 has 12 divisors (see below), whose sum is σ = 367126267872. Its totient is φ = 169205560776.

The previous prime is 253986340213. The next prime is 253986340253. The reversal of 253986340221 is 122043689352.

253986340221 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 8 + 634 + 0 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 253986340221 - 2³ = 253986340213 is a prime.

It is a super-2 number, since 2×253986340221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253986340921) 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, 9875281 + ... + 9900966.

It is an arithmetic number, because the mean of its divisors is an integer number (30593855656).

Almost surely, 2^253986340221 is an apocalyptic number.

It is an amenable number.

253986340221 is a deficient number, since it is larger than the sum of its proper divisors (113139927651).

253986340221 is a wasteful number, since it uses less digits than its factorization.

253986340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19777680 (or 19777677 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 253986340221 in words is "two hundred fifty-three billion, nine hundred eighty-six million, three hundred forty thousand, two hundred twenty-one".