220091229 has 8 divisors (see below), whose sum is σ = 326061120. Its totient is φ = 146727468.

The previous prime is 220091219. The next prime is 220091251. The reversal of 220091229 is 922190022.

It is not a de Polignac number, because 220091229 - 2²⁰ = 219042653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8151527 = 220091229 / (2 + 2 + 0 + 0 + 9 + 1 + 2 + 2 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220091219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4075737 + ... + 4075790.

It is an arithmetic number, because the mean of its divisors is an integer number (40757640).

Almost surely, 2^220091229 is an apocalyptic number.

It is an amenable number.

220091229 is a deficient number, since it is larger than the sum of its proper divisors (105969891).

220091229 is an equidigital number, since it uses as much as digits as its factorization.

220091229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8151536 (or 8151530 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 220091229 is about 14835.4719844028. The cubic root of 220091229 is about 603.7645064220.

The spelling of 220091229 in words is "two hundred twenty million, ninety-one thousand, two hundred twenty-nine".