220135423 has 2 divisors, whose sum is σ = 220135424. Its totient is φ = 220135422.

The previous prime is 220135381. The next prime is 220135457. The reversal of 220135423 is 324531022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220135423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220135394 and 220135403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220135523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110067711 + 110067712.

It is an arithmetic number, because the mean of its divisors is an integer number (110067712).

Almost surely, 2^220135423 is an apocalyptic number.

220135423 is a deficient number, since it is larger than the sum of its proper divisors (1).

220135423 is an equidigital number, since it uses as much as digits as its factorization.

220135423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 220135423 is about 14836.9613802827. The cubic root of 220135423 is about 603.8049153969.

Adding to 220135423 its reverse (324531022), we get a palindrome (544666445).

The spelling of 220135423 in words is "two hundred twenty million, one hundred thirty-five thousand, four hundred twenty-three".