401420231 has 2 divisors, whose sum is σ = 401420232. Its totient is φ = 401420230.

The previous prime is 401420189. The next prime is 401420267. The reversal of 401420231 is 132024104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401420231 is a prime.

It is a super-2 number, since 2×401420231² = 322276403712186722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401420281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200710115 + 200710116.

It is an arithmetic number, because the mean of its divisors is an integer number (200710116).

Almost surely, 2^401420231 is an apocalyptic number.

401420231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401420231 is an equidigital number, since it uses as much as digits as its factorization.

401420231 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 401420231 is about 20035.4743143256. The cubic root of 401420231 is about 737.6772989798.

Adding to 401420231 its reverse (132024104), we get a palindrome (533444335).

The spelling of 401420231 in words is "four hundred one million, four hundred twenty thousand, two hundred thirty-one".