401005987231 has 2 divisors, whose sum is σ = 401005987232. Its totient is φ = 401005987230.

The previous prime is 401005987189. The next prime is 401005987307. The reversal of 401005987231 is 132789500104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401005987231 - 2¹⁷ = 401005856159 is a prime.

It is a super-2 number, since 2×401005987231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401005987631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200502993615 + 200502993616.

It is an arithmetic number, because the mean of its divisors is an integer number (200502993616).

Almost surely, 2^401005987231 is an apocalyptic number.

401005987231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401005987231 is an equidigital number, since it uses as much as digits as its factorization.

401005987231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 401005987231 in words is "four hundred one billion, five million, nine hundred eighty-seven thousand, two hundred thirty-one".