400214243 has 16 divisors (see below), whose sum is σ = 481656672. Its totient is φ = 327648000.

The previous prime is 400214207. The next prime is 400214261. The reversal of 400214243 is 342412004.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400214243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400214203) 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, 28268 + ... + 39993.

It is an arithmetic number, because the mean of its divisors is an integer number (30103542).

Almost surely, 2^400214243 is an apocalyptic number.

400214243 is a deficient number, since it is larger than the sum of its proper divisors (81442429).

400214243 is a wasteful number, since it uses less digits than its factorization.

400214243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68326.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400214243 is about 20005.3553580035. The cubic root of 400214243 is about 736.9378225761.

Adding to 400214243 its reverse (342412004), we get a palindrome (742626247).

The spelling of 400214243 in words is "four hundred million, two hundred fourteen thousand, two hundred forty-three".