253945445 has 16 divisors (see below), whose sum is σ = 328549872. Its totient is φ = 187315200.

The previous prime is 253945441. The next prime is 253945453. The reversal of 253945445 is 544549352.

It can be written as a sum of positive squares in 8 ways, for example, as 19518724 + 234426721 = 4418^2 + 15311^2 .

It is not a de Polignac number, because 253945445 - 2² = 253945441 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 (253945441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76439 + ... + 79691.

It is an arithmetic number, because the mean of its divisors is an integer number (20534367).

Almost surely, 2^253945445 is an apocalyptic number.

It is an amenable number.

253945445 is a deficient number, since it is larger than the sum of its proper divisors (74604427).

253945445 is a wasteful number, since it uses less digits than its factorization.

253945445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472.

The product of its digits is 432000, while the sum is 41.

The square root of 253945445 is about 15935.6658160241. The cubic root of 253945445 is about 633.2572089176.

The spelling of 253945445 in words is "two hundred fifty-three million, nine hundred forty-five thousand, four hundred forty-five".