213871870 has 16 divisors (see below), whose sum is σ = 387521568. Its totient is φ = 84981600.

The previous prime is 213871841. The next prime is 213871891. The reversal of 213871870 is 78178312.

It is a congruent number.

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, 69309 + ... + 72328.

It is an arithmetic number, because the mean of its divisors is an integer number (24220098).

Almost surely, 2^213871870 is an apocalyptic number.

213871870 is a deficient number, since it is larger than the sum of its proper divisors (173649698).

213871870 is a wasteful number, since it uses less digits than its factorization.

213871870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141795.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 213871870 is about 14624.3587893624. The cubic root of 213871870 is about 598.0230022136.

The spelling of 213871870 in words is "two hundred thirteen million, eight hundred seventy-one thousand, eight hundred seventy".