253444021101 has 24 divisors (see below), whose sum is σ = 367318616184. Its totient is φ = 168393922560.

The previous prime is 253444021099. The next prime is 253444021111. The reversal of 253444021101 is 101120444352.

253444021101 is a `hidden beast` number, since 2 + 5 + 3 + 4 + 440 + 211 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7922780100 + 245521241001 = 89010^2 + 495501^2 .

It is not a de Polignac number, because 253444021101 - 2¹ = 253444021099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253444021111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26131485 + ... + 26141181.

It is an arithmetic number, because the mean of its divisors is an integer number (15304942341).

Almost surely, 2^253444021101 is an apocalyptic number.

It is an amenable number.

253444021101 is a deficient number, since it is larger than the sum of its proper divisors (113874595083).

253444021101 is a wasteful number, since it uses less digits than its factorization.

253444021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19181 (or 19178 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 253444021101 its reverse (101120444352), we get a palindrome (354564465453).

The spelling of 253444021101 in words is "two hundred fifty-three billion, four hundred forty-four million, twenty-one thousand, one hundred one".