213403043 has 16 divisors (see below), whose sum is σ = 249661440. Its totient is φ = 178639296.

The previous prime is 213403037. The next prime is 213403049. The reversal of 213403043 is 340304312.

It is an interprime number because it is at equal distance from previous prime (213403037) and next prime (213403049).

It is a cyclic number.

It is not a de Polignac number, because 213403043 - 2⁶ = 213402979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213403049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49646 + ... + 53772.

It is an arithmetic number, because the mean of its divisors is an integer number (15603840).

Almost surely, 2^213403043 is an apocalyptic number.

213403043 is a deficient number, since it is larger than the sum of its proper divisors (36258397).

213403043 is an equidigital number, since it uses as much as digits as its factorization.

213403043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213403043 is about 14608.3210192000. The cubic root of 213403043 is about 597.5857085431.

Adding to 213403043 its reverse (340304312), we get a palindrome (553707355).

The spelling of 213403043 in words is "two hundred thirteen million, four hundred three thousand, forty-three".