220431123 has 24 divisors (see below), whose sum is σ = 347842560. Its totient is φ = 133403760.

The previous prime is 220431109. The next prime is 220431131. The reversal of 220431123 is 321134022.

220431123 is a `hidden beast` number, since 220 + 431 + 12 + 3 = 666.

It is not a de Polignac number, because 220431123 - 2¹⁰ = 220430099 is a prime.

It is a super-2 number, since 2×220431123² = 97179759974082258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220431096 and 220431105.

It is not an unprimeable number, because it can be changed into a prime (220431143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101790 + ... + 103932.

It is an arithmetic number, because the mean of its divisors is an integer number (14493440).

Almost surely, 2^220431123 is an apocalyptic number.

220431123 is a deficient number, since it is larger than the sum of its proper divisors (127411437).

220431123 is a wasteful number, since it uses less digits than its factorization.

220431123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199 (or 3196 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 220431123 is about 14846.9230145509. The cubic root of 220431123 is about 604.0751509126.

Adding to 220431123 its reverse (321134022), we get a palindrome (541565145).

The spelling of 220431123 in words is "two hundred twenty million, four hundred thirty-one thousand, one hundred twenty-three".