253444345 has 32 divisors (see below), whose sum is σ = 381378816. Its totient is φ = 157075200.

The previous prime is 253444343. The next prime is 253444361. The reversal of 253444345 is 543444352.

It is not a de Polignac number, because 253444345 - 2¹ = 253444343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253444345.

It is not an unprimeable number, because it can be changed into a prime (253444343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67867 + ... + 71503.

It is an arithmetic number, because the mean of its divisors is an integer number (11918088).

Almost surely, 2^253444345 is an apocalyptic number.

It is an amenable number.

253444345 is a deficient number, since it is larger than the sum of its proper divisors (127934471).

253444345 is a wasteful number, since it uses less digits than its factorization.

253444345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841.

The product of its digits is 115200, while the sum is 34.

The square root of 253444345 is about 15919.9354584119. The cubic root of 253444345 is about 632.8404079284.

Adding to 253444345 its reverse (543444352), we get a palindrome (796888697).

The spelling of 253444345 in words is "two hundred fifty-three million, four hundred forty-four thousand, three hundred forty-five".