400421133 has 48 divisors (see below), whose sum is σ = 678787200. Its totient is φ = 222746112.

The previous prime is 400421123. The next prime is 400421149. The reversal of 400421133 is 331124004.

It is not a de Polignac number, because 400421133 - 2⁶ = 400421069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400421113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 381193 + ... + 382241.

It is an arithmetic number, because the mean of its divisors is an integer number (14141400).

Almost surely, 2^400421133 is an apocalyptic number.

It is an amenable number.

400421133 is a deficient number, since it is larger than the sum of its proper divisors (278366067).

400421133 is a wasteful number, since it uses less digits than its factorization.

400421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400421133 is about 20010.5255553171. The cubic root of 400421133 is about 737.0647869076.

Adding to 400421133 its reverse (331124004), we get a palindrome (731545137).

The spelling of 400421133 in words is "four hundred million, four hundred twenty-one thousand, one hundred thirty-three".