213538738 has 16 divisors (see below), whose sum is σ = 370702080. Its totient is φ = 90357696.

The previous prime is 213538697. The next prime is 213538763. The reversal of 213538738 is 837835312.

It is a self number, because there is not a number n which added to its sum of digits gives 213538738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95431 + ... + 97642.

It is an arithmetic number, because the mean of its divisors is an integer number (23168880).

Almost surely, 2^213538738 is an apocalyptic number.

213538738 is a deficient number, since it is larger than the sum of its proper divisors (157163342).

213538738 is a wasteful number, since it uses less digits than its factorization.

213538738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193161.

The product of its digits is 120960, while the sum is 40.

The square root of 213538738 is about 14612.9647231491. The cubic root of 213538738 is about 597.7123424943.

The spelling of 213538738 in words is "two hundred thirteen million, five hundred thirty-eight thousand, seven hundred thirty-eight".