213975133 has 2 divisors, whose sum is σ = 213975134. Its totient is φ = 213975132.

The previous prime is 213975127. The next prime is 213975173. The reversal of 213975133 is 331579312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163891204 + 50083929 = 12802^2 + 7077^2 .

It is a cyclic number.

It is not a de Polignac number, because 213975133 - 2⁵ = 213975101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213975103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106987566 + 106987567.

It is an arithmetic number, because the mean of its divisors is an integer number (106987567).

Almost surely, 2^213975133 is an apocalyptic number.

It is an amenable number.

213975133 is a deficient number, since it is larger than the sum of its proper divisors (1).

213975133 is an equidigital number, since it uses as much as digits as its factorization.

213975133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 34.

The square root of 213975133 is about 14627.8888770731. Note that the first 4 decimals coincide. The cubic root of 213975133 is about 598.1192338392.

The spelling of 213975133 in words is "two hundred thirteen million, nine hundred seventy-five thousand, one hundred thirty-three".