220774399 has 4 divisors (see below), whose sum is σ = 220826464. Its totient is φ = 220722336.

The previous prime is 220774363. The next prime is 220774403. The reversal of 220774399 is 993477022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220774399 - 2²¹ = 218677247 is a prime.

It is a super-2 number, since 2×220774399² = 97482670507622402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220774339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19047 + ... + 28360.

It is an arithmetic number, because the mean of its divisors is an integer number (55206616).

Almost surely, 2^220774399 is an apocalyptic number.

220774399 is a deficient number, since it is larger than the sum of its proper divisors (52065).

220774399 is an equidigital number, since it uses as much as digits as its factorization.

220774399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52064.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 220774399 is about 14858.4790271414. The cubic root of 220774399 is about 604.3885624207.

The spelling of 220774399 in words is "two hundred twenty million, seven hundred seventy-four thousand, three hundred ninety-nine".