213166215207 has 24 divisors (see below), whose sum is σ = 335970045840. Its totient is φ = 129164042880.

The previous prime is 213166215203. The next prime is 213166215209. The reversal of 213166215207 is 702512661312.

213166215207 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 6 + 621 + 5 + 20 + 7 = 666.

It is not a de Polignac number, because 213166215207 - 2² = 213166215203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213166215203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240513 + ... + 695829.

It is an arithmetic number, because the mean of its divisors is an integer number (13998751910).

Almost surely, 2^213166215207 is an apocalyptic number.

213166215207 is a deficient number, since it is larger than the sum of its proper divisors (122803830633).

213166215207 is a wasteful number, since it uses less digits than its factorization.

213166215207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460063 (or 460060 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 213166215207 its reverse (702512661312), we get a palindrome (915678876519).

The spelling of 213166215207 in words is "two hundred thirteen billion, one hundred sixty-six million, two hundred fifteen thousand, two hundred seven".