312523222 has 16 divisors (see below), whose sum is σ = 512582400. Its totient is φ = 141728040.

The previous prime is 312523193. The next prime is 312523261. The reversal of 312523222 is 222325213.

It is a super-2 number, since 2×312523222² = 195341528578522568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 312523193 and 312523202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6522 + ... + 25837.

It is an arithmetic number, because the mean of its divisors is an integer number (32036400).

Almost surely, 2^312523222 is an apocalyptic number.

312523222 is a deficient number, since it is larger than the sum of its proper divisors (200059178).

312523222 is a wasteful number, since it uses less digits than its factorization.

312523222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32811.

The product of its digits is 1440, while the sum is 22.

The square root of 312523222 is about 17678.3263348090. The cubic root of 312523222 is about 678.6212128540.

Adding to 312523222 its reverse (222325213), we get a palindrome (534848435).

The spelling of 312523222 in words is "three hundred twelve million, five hundred twenty-three thousand, two hundred twenty-two".