312312553 has 4 divisors (see below), whose sum is σ = 356928640. Its totient is φ = 267696468.

The previous prime is 312312551. The next prime is 312312587. The reversal of 312312553 is 355213213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355213213 = 71 ⋅5003003.

It is a cyclic number.

It is not a de Polignac number, because 312312553 - 2¹ = 312312551 is a prime.

It is a super-2 number, since 2×312312553² = 195078261522755618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312312551) 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, 22308033 + ... + 22308046.

It is an arithmetic number, because the mean of its divisors is an integer number (89232160).

Almost surely, 2^312312553 is an apocalyptic number.

It is an amenable number.

312312553 is a deficient number, since it is larger than the sum of its proper divisors (44616087).

312312553 is an equidigital number, since it uses as much as digits as its factorization.

312312553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44616086.

The product of its digits is 2700, while the sum is 25.

The square root of 312312553 is about 17672.3669325872. The cubic root of 312312553 is about 678.4686944938.

Subtracting from 312312553 its sum of digits (25), we obtain a triangular number (312312528 = T₂₄₉₉₂).

Adding to 312312553 its reverse (355213213), we get a palindrome (667525766).

The spelling of 312312553 in words is "three hundred twelve million, three hundred twelve thousand, five hundred fifty-three".