213142917 has 16 divisors (see below), whose sum is σ = 307052928. Its totient is φ = 130735680.

The previous prime is 213142859. The next prime is 213142927. The reversal of 213142917 is 719241312.

It is not a de Polignac number, because 213142917 - 2⁷ = 213142789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213142927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3343 + ... + 20915.

It is an arithmetic number, because the mean of its divisors is an integer number (19190808).

Almost surely, 2^213142917 is an apocalyptic number.

It is an amenable number.

213142917 is a deficient number, since it is larger than the sum of its proper divisors (93910011).

213142917 is a wasteful number, since it uses less digits than its factorization.

213142917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900.

The product of its digits is 3024, while the sum is 30.

The square root of 213142917 is about 14599.4149540315. The cubic root of 213142917 is about 597.3428023172.

The spelling of 213142917 in words is "two hundred thirteen million, one hundred forty-two thousand, nine hundred seventeen".