220998226 has 4 divisors (see below), whose sum is σ = 331497342. Its totient is φ = 110499112.

The previous prime is 220998223. The next prime is 220998251. The reversal of 220998226 is 622899022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622899022 = 2 ⋅311449511.

It can be written as a sum of positive squares in only one way, i.e., 206928225 + 14070001 = 14385^2 + 3751^2 .

It is not an unprimeable number, because it can be changed into a prime (220998223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55249555 + ... + 55249558.

Almost surely, 2^220998226 is an apocalyptic number.

220998226 is a deficient number, since it is larger than the sum of its proper divisors (110499116).

220998226 is a wasteful number, since it uses less digits than its factorization.

220998226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110499115.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 220998226 is about 14866.0090811219. The cubic root of 220998226 is about 604.5927418739.

The spelling of 220998226 in words is "two hundred twenty million, nine hundred ninety-eight thousand, two hundred twenty-six".