213138801 has 6 divisors (see below), whose sum is σ = 307867170. Its totient is φ = 142092528.

The previous prime is 213138643. The next prime is 213138803. The reversal of 213138801 is 108831312.

It can be written as a sum of positive squares in only one way, i.e., 148352400 + 64786401 = 12180^2 + 8049^2 .

It is not a de Polignac number, because 213138801 - 2¹⁰ = 213137777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213138803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11841036 + ... + 11841053.

It is an arithmetic number, because the mean of its divisors is an integer number (51311195).

Almost surely, 2^213138801 is an apocalyptic number.

It is an amenable number.

213138801 is a deficient number, since it is larger than the sum of its proper divisors (94728369).

213138801 is a wasteful number, since it uses less digits than its factorization.

213138801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23682095 (or 23682092 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 213138801 is about 14599.2739887982. The cubic root of 213138801 is about 597.3389571995.

The spelling of 213138801 in words is "two hundred thirteen million, one hundred thirty-eight thousand, eight hundred one".