220228139 has 4 divisors (see below), whose sum is σ = 221631024. Its totient is φ = 218825256.

The previous prime is 220228103. The next prime is 220228171. The reversal of 220228139 is 931822022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931822022 = 2 ⋅465911011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220228139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220228189) 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, 701207 + ... + 701520.

It is an arithmetic number, because the mean of its divisors is an integer number (55407756).

Almost surely, 2^220228139 is an apocalyptic number.

220228139 is a deficient number, since it is larger than the sum of its proper divisors (1402885).

220228139 is a wasteful number, since it uses less digits than its factorization.

220228139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402884.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 220228139 is about 14840.0855455755. The cubic root of 220228139 is about 603.8896731006.

The spelling of 220228139 in words is "two hundred twenty million, two hundred twenty-eight thousand, one hundred thirty-nine".