213510197 has 2 divisors, whose sum is σ = 213510198. Its totient is φ = 213510196.

The previous prime is 213510169. The next prime is 213510217. The reversal of 213510197 is 791015312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141158161 + 72352036 = 11881^2 + 8506^2 .

It is a cyclic number.

It is not a de Polignac number, because 213510197 - 2²⁰ = 212461621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213510107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106755098 + 106755099.

It is an arithmetic number, because the mean of its divisors is an integer number (106755099).

Almost surely, 2^213510197 is an apocalyptic number.

It is an amenable number.

213510197 is a deficient number, since it is larger than the sum of its proper divisors (1).

213510197 is an equidigital number, since it uses as much as digits as its factorization.

213510197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 213510197 is about 14611.9881261928. The cubic root of 213510197 is about 597.6857117789.

The spelling of 213510197 in words is "two hundred thirteen million, five hundred ten thousand, one hundred ninety-seven".