346221312 has 36 divisors (see below), whose sum is σ = 921455640. Its totient is φ = 115406848.

The previous prime is 346221311. The next prime is 346221383. The reversal of 346221312 is 213122643.

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 (346221311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224637 + ... + 226172.

It is an arithmetic number, because the mean of its divisors is an integer number (25595990).

Almost surely, 2^346221312 is an apocalyptic number.

346221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

346221312 is an abundant number, since it is smaller than the sum of its proper divisors (575234328).

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

346221312 is an equidigital number, since it uses as much as digits as its factorization.

346221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450828 (or 450814 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 346221312 is about 18607.0231901828. The cubic root of 346221312 is about 702.1845441397.

Adding to 346221312 its reverse (213122643), we get a palindrome (559343955).

The spelling of 346221312 in words is "three hundred forty-six million, two hundred twenty-one thousand, three hundred twelve".