220340431 has 2 divisors, whose sum is σ = 220340432. Its totient is φ = 220340430.

The previous prime is 220340399. The next prime is 220340443. The reversal of 220340431 is 134043022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220340431 - 2⁵ = 220340399 is a prime.

It is a super-2 number, since 2×220340431² = 97099811066531522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220340399 and 220340408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220341431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110170215 + 110170216.

It is an arithmetic number, because the mean of its divisors is an integer number (110170216).

Almost surely, 2^220340431 is an apocalyptic number.

220340431 is a deficient number, since it is larger than the sum of its proper divisors (1).

220340431 is an equidigital number, since it uses as much as digits as its factorization.

220340431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 220340431 is about 14843.8684647904. The cubic root of 220340431 is about 603.9922946475.

Adding to 220340431 its reverse (134043022), we get a palindrome (354383453).

The spelling of 220340431 in words is "two hundred twenty million, three hundred forty thousand, four hundred thirty-one".