220123156 has 48 divisors (see below), whose sum is σ = 440391168. Its totient is φ = 95295200.

The previous prime is 220123153. The next prime is 220123177. The reversal of 220123156 is 651321022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220123153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448071 + ... + 448561.

It is an arithmetic number, because the mean of its divisors is an integer number (9174816).

Almost surely, 2^220123156 is an apocalyptic number.

It is an amenable number.

220123156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

220123156 is a wasteful number, since it uses less digits than its factorization.

220123156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 220123156 is about 14836.5479812522. The cubic root of 220123156 is about 603.7936995547.

Adding to 220123156 its reverse (651321022), we get a palindrome (871444178).

The spelling of 220123156 in words is "two hundred twenty million, one hundred twenty-three thousand, one hundred fifty-six".