400022011 has 4 divisors (see below), whose sum is σ = 400087800. Its totient is φ = 399956224.

The previous prime is 400021987. The next prime is 400022017. The reversal of 400022011 is 110220004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400022011 - 2²⁷ = 265804283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400022017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22726 + ... + 36283.

It is an arithmetic number, because the mean of its divisors is an integer number (100021950).

Almost surely, 2^400022011 is an apocalyptic number.

400022011 is a deficient number, since it is larger than the sum of its proper divisors (65789).

400022011 is an equidigital number, since it uses as much as digits as its factorization.

400022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65788.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 400022011 is about 20000.5502674301. The cubic root of 400022011 is about 736.8198143497.

Adding to 400022011 its reverse (110220004), we get a palindrome (510242015).

The spelling of 400022011 in words is "four hundred million, twenty-two thousand, eleven".