400213541 has 16 divisors (see below), whose sum is σ = 521547264. Its totient is φ = 298024704.

The previous prime is 400213531. The next prime is 400213573. The reversal of 400213541 is 145312004.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400213541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400213531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127805 + ... + 130898.

It is an arithmetic number, because the mean of its divisors is an integer number (32596704).

Almost surely, 2^400213541 is an apocalyptic number.

It is an amenable number.

400213541 is a deficient number, since it is larger than the sum of its proper divisors (121333723).

400213541 is a wasteful number, since it uses less digits than its factorization.

400213541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258740.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400213541 is about 20005.3378126939. The cubic root of 400213541 is about 736.9373916980.

Adding to 400213541 its reverse (145312004), we get a palindrome (545525545).

The spelling of 400213541 in words is "four hundred million, two hundred thirteen thousand, five hundred forty-one".