213122603 has 2 divisors, whose sum is σ = 213122604. Its totient is φ = 213122602.

The previous prime is 213122599. The next prime is 213122629. The reversal of 213122603 is 306221312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213122603 - 2² = 213122599 is a prime.

It is not a weakly prime, because it can be changed into another prime (213122683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561301 + 106561302.

It is an arithmetic number, because the mean of its divisors is an integer number (106561302).

Almost surely, 2^213122603 is an apocalyptic number.

213122603 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122603 is an equidigital number, since it uses as much as digits as its factorization.

213122603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 213122603 is about 14598.7192246443. The cubic root of 213122603 is about 597.3238247420.

Adding to 213122603 its reverse (306221312), we get a palindrome (519343915).

The spelling of 213122603 in words is "two hundred thirteen million, one hundred twenty-two thousand, six hundred three".