400133541 has 16 divisors (see below), whose sum is σ = 540439040. Its totient is φ = 263314800.

The previous prime is 400133527. The next prime is 400133549. The reversal of 400133541 is 145331004.

It is not a de Polignac number, because 400133541 - 2⁶ = 400133477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400133549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71130 + ... + 76548.

It is an arithmetic number, because the mean of its divisors is an integer number (33777440).

Almost surely, 2^400133541 is an apocalyptic number.

It is an amenable number.

400133541 is a deficient number, since it is larger than the sum of its proper divisors (140305499).

400133541 is a wasteful number, since it uses less digits than its factorization.

400133541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 400133541 is about 20003.3382464028. The cubic root of 400133541 is about 736.8882854801. Note that the first 3 decimals are identical.

Adding to 400133541 its reverse (145331004), we get a palindrome (545464545).

The spelling of 400133541 in words is "four hundred million, one hundred thirty-three thousand, five hundred forty-one".