401942231 has 2 divisors, whose sum is σ = 401942232. Its totient is φ = 401942230.

The previous prime is 401942201. The next prime is 401942267. The reversal of 401942231 is 132249104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401942231 - 2¹⁰ = 401941207 is a prime.

It is a super-2 number, since 2×401942231² = 323115114122514722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401942231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401942201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200971115 + 200971116.

It is an arithmetic number, because the mean of its divisors is an integer number (200971116).

Almost surely, 2^401942231 is an apocalyptic number.

401942231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401942231 is an equidigital number, since it uses as much as digits as its factorization.

401942231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 401942231 is about 20048.4969760828. The cubic root of 401942231 is about 737.9969147914.

The spelling of 401942231 in words is "four hundred one million, nine hundred forty-two thousand, two hundred thirty-one".