220401431 has 2 divisors, whose sum is σ = 220401432. Its totient is φ = 220401430.

The previous prime is 220401397. The next prime is 220401439. The reversal of 220401431 is 134104022.

220401431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220401431 - 2²² = 216207127 is a prime.

It is a super-2 number, since 2×220401431² = 97153581573695522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220401439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110200715 + 110200716.

It is an arithmetic number, because the mean of its divisors is an integer number (110200716).

Almost surely, 2^220401431 is an apocalyptic number.

220401431 is a deficient number, since it is larger than the sum of its proper divisors (1).

220401431 is an equidigital number, since it uses as much as digits as its factorization.

220401431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220401431 is about 14845.9230430445. The cubic root of 220401431 is about 604.0480267865.

Adding to 220401431 its reverse (134104022), we get a palindrome (354505453).

The spelling of 220401431 in words is "two hundred twenty million, four hundred one thousand, four hundred thirty-one".