213210638 has 4 divisors (see below), whose sum is σ = 319815960. Its totient is φ = 106605318.

The previous prime is 213210637. The next prime is 213210643. The reversal of 213210638 is 836012312.

213210638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213210637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53302658 + ... + 53302661.

It is an arithmetic number, because the mean of its divisors is an integer number (79953990).

Almost surely, 2^213210638 is an apocalyptic number.

213210638 is a deficient number, since it is larger than the sum of its proper divisors (106605322).

213210638 is a wasteful number, since it uses less digits than its factorization.

213210638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106605321.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 213210638 is about 14601.7340751022. The cubic root of 213210638 is about 597.4060593545.

The spelling of 213210638 in words is "two hundred thirteen million, two hundred ten thousand, six hundred thirty-eight".