61222216 has 32 divisors (see below), whose sum is σ = 125686080. Its totient is φ = 27726400.

The previous prime is 61222207. The next prime is 61222243.

61222216 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 26250 + ... + 28486.

It is an arithmetic number, because the mean of its divisors is an integer number (3927690).

Almost surely, 2^61222216 is an apocalyptic number.

It is an amenable number.

61222216 is an abundant number, since it is smaller than the sum of its proper divisors (64463864).

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

61222216 is a wasteful number, since it uses less digits than its factorization.

61222216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2561 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 61222216 is about 7824.4626652570. The cubic root of 61222216 is about 394.1271459576.

It can be divided in two parts, 6122 and 2216, that added together give a palindrome (8338).

The spelling of 61222216 in words is "sixty-one million, two hundred twenty-two thousand, two hundred sixteen".