312643253 has 4 divisors (see below), whose sum is σ = 336692748. Its totient is φ = 288593760.

The previous prime is 312643249. The next prime is 312643307. The reversal of 312643253 is 352346213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158709604 + 153933649 = 12598^2 + 12407^2 .

It is not a de Polignac number, because 312643253 - 2² = 312643249 is a prime.

It is a super-4 number, since 4×312643253⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312643223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12024728 + ... + 12024753.

It is an arithmetic number, because the mean of its divisors is an integer number (84173187).

Almost surely, 2^312643253 is an apocalyptic number.

It is an amenable number.

312643253 is a deficient number, since it is larger than the sum of its proper divisors (24049495).

312643253 is a wasteful number, since it uses less digits than its factorization.

312643253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24049494.

The product of its digits is 12960, while the sum is 29.

The square root of 312643253 is about 17681.7208721323. The cubic root of 312643253 is about 678.7080812326.

Adding to 312643253 its product of digits (12960), we get a palindrome (312656213).

Adding to 312643253 its reverse (352346213), we get a palindrome (664989466).

The spelling of 312643253 in words is "three hundred twelve million, six hundred forty-three thousand, two hundred fifty-three".