312223632 has 160 divisors (see below), whose sum is σ = 997650432. Its totient is φ = 82102272.

The previous prime is 312223631. The next prime is 312223699. The reversal of 312223632 is 236322213.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (312223631) 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, 267883 + ... + 269045.

Almost surely, 2^312223632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312223632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498825216).

312223632 is an abundant number, since it is smaller than the sum of its proper divisors (685426800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312223632 is a wasteful number, since it uses less digits than its factorization.

312223632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1239 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 312223632 is about 17669.8509331573. The cubic root of 312223632 is about 678.4042976358.

Adding to 312223632 its reverse (236322213), we get a palindrome (548545845).

The spelling of 312223632 in words is "three hundred twelve million, two hundred twenty-three thousand, six hundred thirty-two".