401432231 has 2 divisors, whose sum is σ = 401432232. Its totient is φ = 401432230.

The previous prime is 401432167. The next prime is 401432243. The reversal of 401432231 is 132234104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401432231 - 2⁶ = 401432167 is a prime.

It is a super-2 number, since 2×401432231² = 322295672171274722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401432261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200716115 + 200716116.

It is an arithmetic number, because the mean of its divisors is an integer number (200716116).

Almost surely, 2^401432231 is an apocalyptic number.

401432231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401432231 is an equidigital number, since it uses as much as digits as its factorization.

401432231 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 20.

The square root of 401432231 is about 20035.7737809150. The cubic root of 401432231 is about 737.6846495804.

Adding to 401432231 its reverse (132234104), we get a palindrome (533666335).

The spelling of 401432231 in words is "four hundred one million, four hundred thirty-two thousand, two hundred thirty-one".