220156431 has 32 divisors (see below), whose sum is σ = 330815232. Its totient is φ = 129077760.

The previous prime is 220156411. The next prime is 220156441. The reversal of 220156431 is 134651022.

It is not a de Polignac number, because 220156431 - 2⁵ = 220156399 is a prime.

It is a super-2 number, since 2×220156431² = 96937708221315522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220156411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159661 + ... + 161033.

It is an arithmetic number, because the mean of its divisors is an integer number (10337976).

Almost surely, 2^220156431 is an apocalyptic number.

220156431 is a deficient number, since it is larger than the sum of its proper divisors (110658801).

220156431 is a wasteful number, since it uses less digits than its factorization.

220156431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 220156431 is about 14837.6693250658. The cubic root of 220156431 is about 603.8241222560.

It can be divided in two parts, 220 and 156431, that added together give a palindrome (156651).

The spelling of 220156431 in words is "two hundred twenty million, one hundred fifty-six thousand, four hundred thirty-one".