220312212 has 24 divisors (see below), whose sum is σ = 520257696. Its totient is φ = 72552288.

The previous prime is 220312187. The next prime is 220312237. The reversal of 220312212 is 212213022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220312187) and next prime (220312237).

It is a super-3 number, since 3×220312212³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220312191 and 220312200.

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, 109603 + ... + 111594.

It is an arithmetic number, because the mean of its divisors is an integer number (21677404).

Almost surely, 2^220312212 is an apocalyptic number.

It is an amenable number.

220312212 is an abundant number, since it is smaller than the sum of its proper divisors (299945484).

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

220312212 is a wasteful number, since it uses less digits than its factorization.

220312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221287 (or 221285 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 220312212 is about 14842.9179072041. The cubic root of 220312212 is about 603.9665091148.

Adding to 220312212 its reverse (212213022), we get a palindrome (432525234).

The spelling of 220312212 in words is "two hundred twenty million, three hundred twelve thousand, two hundred twelve".