253440045 has 12 divisors (see below), whose sum is σ = 439296156. Its totient is φ = 135168000.

The previous prime is 253440043. The next prime is 253440053. The reversal of 253440045 is 540044352.

253440045 is a `hidden beast` number, since 253 + 4 + 400 + 4 + 5 = 666.

253440045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162256644 + 91183401 = 12738^2 + 9549^2 .

It is not a de Polignac number, because 253440045 - 2¹ = 253440043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253440041) 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, 2815956 + ... + 2816045.

It is an arithmetic number, because the mean of its divisors is an integer number (36608013).

Almost surely, 2^253440045 is an apocalyptic number.

It is an amenable number.

253440045 is a deficient number, since it is larger than the sum of its proper divisors (185856111).

253440045 is a wasteful number, since it uses less digits than its factorization.

253440045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632012 (or 5632009 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 253440045 is about 15919.8004070403. The cubic root of 253440045 is about 632.8368289320.

Adding to 253440045 its reverse (540044352), we get a palindrome (793484397).

The spelling of 253440045 in words is "two hundred fifty-three million, four hundred forty thousand, forty-five".