312220230 has 64 divisors (see below), whose sum is σ = 859714560. Its totient is φ = 71086464.

The previous prime is 312220219. The next prime is 312220231. The reversal of 312220230 is 32022213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220231) 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, 53727 + ... + 59253.

It is an arithmetic number, because the mean of its divisors is an integer number (13433040).

Almost surely, 2^312220230 is an apocalyptic number.

312220230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 312220230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429857280).

312220230 is an abundant number, since it is smaller than the sum of its proper divisors (547494330).

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

312220230 is a wasteful number, since it uses less digits than its factorization.

312220230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5813.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 312220230 is about 17669.7546672273. The cubic root of 312220230 is about 678.4018336542.

Adding to 312220230 its reverse (32022213), we get a palindrome (344242443).

The spelling of 312220230 in words is "three hundred twelve million, two hundred twenty thousand, two hundred thirty".