220340031 has 4 divisors (see below), whose sum is σ = 293786712. Its totient is φ = 146893352.

The previous prime is 220340011. The next prime is 220340039. The reversal of 220340031 is 130043022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220340031 - 2²¹ = 218242879 is a prime.

It is a super-2 number, since 2×220340031² = 97099458522161922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220340039) 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, 36723336 + ... + 36723341.

It is an arithmetic number, because the mean of its divisors is an integer number (73446678).

Almost surely, 2^220340031 is an apocalyptic number.

220340031 is a deficient number, since it is larger than the sum of its proper divisors (73446681).

220340031 is an equidigital number, since it uses as much as digits as its factorization.

220340031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73446680.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 220340031 is about 14843.8549912076. The cubic root of 220340031 is about 603.9919291570.

Adding to 220340031 its reverse (130043022), we get a palindrome (350383053).

The spelling of 220340031 in words is "two hundred twenty million, three hundred forty thousand, thirty-one".