220312131 has 16 divisors (see below), whose sum is σ = 316813056. Its totient is φ = 135376416.

The previous prime is 220312109. The next prime is 220312187. The reversal of 220312131 is 131213022.

It is not a de Polignac number, because 220312131 - 2⁶ = 220312067 is a prime.

It is a super-2 number, since 2×220312131² = 97074870131522322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220312131.

It is not an unprimeable number, because it can be changed into a prime (220312031) 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, 25176 + ... + 32778.

It is an arithmetic number, because the mean of its divisors is an integer number (19800816).

Almost surely, 2^220312131 is an apocalyptic number.

220312131 is a deficient number, since it is larger than the sum of its proper divisors (96500925).

220312131 is a wasteful number, since it uses less digits than its factorization.

220312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8362.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 220312131 is about 14842.9151786298. The cubic root of 220312131 is about 603.9664350966.

Adding to 220312131 its reverse (131213022), we get a palindrome (351525153).

The spelling of 220312131 in words is "two hundred twenty million, three hundred twelve thousand, one hundred thirty-one".