401400511 has 2 divisors, whose sum is σ = 401400512. Its totient is φ = 401400510.

The previous prime is 401400509. The next prime is 401400553. The reversal of 401400511 is 115004104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401400511 - 2¹ = 401400509 is a prime.

It is a super-2 number, since 2×401400511² = 322244740462122242, which contains 22 as substring.

Together with 401400509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401400581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200700255 + 200700256.

It is an arithmetic number, because the mean of its divisors is an integer number (200700256).

Almost surely, 2^401400511 is an apocalyptic number.

401400511 is a deficient number, since it is larger than the sum of its proper divisors (1).

401400511 is an equidigital number, since it uses as much as digits as its factorization.

401400511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 401400511 is about 20034.9821811750. The cubic root of 401400511 is about 737.6652191746.

Adding to 401400511 its reverse (115004104), we get a palindrome (516404615).

The spelling of 401400511 in words is "four hundred one million, four hundred thousand, five hundred eleven".