400511011 has 2 divisors, whose sum is σ = 400511012. Its totient is φ = 400511010.

The previous prime is 400510969. The next prime is 400511063. The reversal of 400511011 is 110115004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400511011 - 2⁹ = 400510499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400510982 and 400511000.

It is not a weakly prime, because it can be changed into another prime (400511081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200255505 + 200255506.

It is an arithmetic number, because the mean of its divisors is an integer number (200255506).

Almost surely, 2^400511011 is an apocalyptic number.

400511011 is a deficient number, since it is larger than the sum of its proper divisors (1).

400511011 is an equidigital number, since it uses as much as digits as its factorization.

400511011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 400511011 is about 20012.7711974129. The cubic root of 400511011 is about 737.1199296457.

Adding to 400511011 its reverse (110115004), we get a palindrome (510626015).

The spelling of 400511011 in words is "four hundred million, five hundred eleven thousand, eleven".