213010403 has 2 divisors, whose sum is σ = 213010404. Its totient is φ = 213010402.

The previous prime is 213010381. The next prime is 213010409. The reversal of 213010403 is 304010312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213010403 - 2¹⁶ = 212944867 is a prime.

It is not a weakly prime, because it can be changed into another prime (213010409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106505201 + 106505202.

It is an arithmetic number, because the mean of its divisors is an integer number (106505202).

Almost surely, 2^213010403 is an apocalyptic number.

213010403 is a deficient number, since it is larger than the sum of its proper divisors (1).

213010403 is an equidigital number, since it uses as much as digits as its factorization.

213010403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213010403 is about 14594.8759158823. The cubic root of 213010403 is about 597.2189844659.

Adding to 213010403 its reverse (304010312), we get a palindrome (517020715).

Subtracting 213010403 from its reverse (304010312), we obtain a palindrome (90999909).

The spelling of 213010403 in words is "two hundred thirteen million, ten thousand, four hundred three".