253513845 has 24 divisors (see below), whose sum is σ = 473226936. Its totient is φ = 124806528.

The previous prime is 253513837. The next prime is 253513847. The reversal of 253513845 is 548315352.

253513845 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 4 ways, for example, as 799236 + 252714609 = 894^2 + 15897^2 .

It is not a de Polignac number, because 253513845 - 2³ = 253513837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253513847) 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, 216094 + ... + 217263.

It is an arithmetic number, because the mean of its divisors is an integer number (19717789).

Almost surely, 2^253513845 is an apocalyptic number.

It is an amenable number.

253513845 is a deficient number, since it is larger than the sum of its proper divisors (219713091).

253513845 is a wasteful number, since it uses less digits than its factorization.

253513845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433381 (or 433378 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 253513845 is about 15922.1181065837. The cubic root of 253513845 is about 632.8982488831.

The spelling of 253513845 in words is "two hundred fifty-three million, five hundred thirteen thousand, eight hundred forty-five".