220135031 has 4 divisors (see below), whose sum is σ = 223743864. Its totient is φ = 216526200.

The previous prime is 220135021. The next prime is 220135033. The reversal of 220135031 is 130531022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130531022 = 2 ⋅65265511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220135031 is a prime.

It is a super-2 number, since 2×220135031² = 96918863746741922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220135033) 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, 1804325 + ... + 1804446.

It is an arithmetic number, because the mean of its divisors is an integer number (55935966).

Almost surely, 2^220135031 is an apocalyptic number.

220135031 is a deficient number, since it is larger than the sum of its proper divisors (3608833).

220135031 is an equidigital number, since it uses as much as digits as its factorization.

220135031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608832.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 220135031 is about 14836.9481700247. The cubic root of 220135031 is about 603.8045569938.

Adding to 220135031 its reverse (130531022), we get a palindrome (350666053).

The spelling of 220135031 in words is "two hundred twenty million, one hundred thirty-five thousand, thirty-one".