312223240 has 64 divisors (see below), whose sum is σ = 807903360. Its totient is φ = 106375680.

The previous prime is 312223237. The next prime is 312223253. The reversal of 312223240 is 42322213.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42220 + ... + 49060.

It is an arithmetic number, because the mean of its divisors is an integer number (12623490).

Almost surely, 2^312223240 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 312223240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403951680).

312223240 is an abundant number, since it is smaller than the sum of its proper divisors (495680120).

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

312223240 is a wasteful number, since it uses less digits than its factorization.

312223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022 (or 7018 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 312223240 is about 17669.8398408135. The cubic root of 312223240 is about 678.4040137211.

Adding to 312223240 its reverse (42322213), we get a palindrome (354545453).

It can be divided in two parts, 3122 and 23240, that added together give a palindrome (26362).

The spelling of 312223240 in words is "three hundred twelve million, two hundred twenty-three thousand, two hundred forty".