213031043 has 2 divisors, whose sum is σ = 213031044. Its totient is φ = 213031042.

The previous prime is 213031031. The next prime is 213031069. The reversal of 213031043 is 340130312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213031043 - 2⁸ = 213030787 is a prime.

It is not a weakly prime, because it can be changed into another prime (213031003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515521 + 106515522.

It is an arithmetic number, because the mean of its divisors is an integer number (106515522).

Almost surely, 2^213031043 is an apocalyptic number.

213031043 is a deficient number, since it is larger than the sum of its proper divisors (1).

213031043 is an equidigital number, since it uses as much as digits as its factorization.

213031043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213031043 is about 14595.5829962355. The cubic root of 213031043 is about 597.2382733544.

Adding to 213031043 its reverse (340130312), we get a palindrome (553161355).

The spelling of 213031043 in words is "two hundred thirteen million, thirty-one thousand, forty-three".