213643870 has 32 divisors (see below), whose sum is σ = 433991520. Its totient is φ = 75008640.

The previous prime is 213643861. The next prime is 213643889. The reversal of 213643870 is 78346312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30297 + ... + 36676.

It is an arithmetic number, because the mean of its divisors is an integer number (13562235).

Almost surely, 2^213643870 is an apocalyptic number.

213643870 is an abundant number, since it is smaller than the sum of its proper divisors (220347650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213643870 is a wasteful number, since it uses less digits than its factorization.

213643870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67020.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 213643870 is about 14616.5614971511. The cubic root of 213643870 is about 597.8104174149.

The spelling of 213643870 in words is "two hundred thirteen million, six hundred forty-three thousand, eight hundred seventy".