400211542 has 16 divisors (see below), whose sum is σ = 621491760. Its totient is φ = 193058208.

The previous prime is 400211531. The next prime is 400211543. The reversal of 400211542 is 245112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400211543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141688 + ... + 144484.

It is an arithmetic number, because the mean of its divisors is an integer number (38843235).

Almost surely, 2^400211542 is an apocalyptic number.

400211542 is a deficient number, since it is larger than the sum of its proper divisors (221280218).

400211542 is a wasteful number, since it uses less digits than its factorization.

400211542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 400211542 is about 20005.2878509658. The cubic root of 400211542 is about 736.9361647361.

Adding to 400211542 its reverse (245112004), we get a palindrome (645323546).

The spelling of 400211542 in words is "four hundred million, two hundred eleven thousand, five hundred forty-two".