320440253 has 12 divisors (see below), whose sum is σ = 378011232. Its totient is φ = 270791640.

The previous prime is 320440249. The next prime is 320440277. The reversal of 320440253 is 352044023.

It is not a de Polignac number, because 320440253 - 2² = 320440249 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 (320440243) 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, 42575 + ... + 49532.

It is an arithmetic number, because the mean of its divisors is an integer number (31500936).

Almost surely, 2^320440253 is an apocalyptic number.

It is an amenable number.

320440253 is a deficient number, since it is larger than the sum of its proper divisors (57570979).

320440253 is an equidigital number, since it uses as much as digits as its factorization.

320440253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92192 (or 92185 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 320440253 is about 17900.8450359194. The cubic root of 320440253 is about 684.3039107800.

Adding to 320440253 its reverse (352044023), we get a palindrome (672484276).

The spelling of 320440253 in words is "three hundred twenty million, four hundred forty thousand, two hundred fifty-three".