213189870 has 32 divisors (see below), whose sum is σ = 512376480. Its totient is φ = 56770560.

The previous prime is 213189869. The next prime is 213189871. The reversal of 213189870 is 78981312.

213189870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213189869) and next prime (213189871).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213189871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18450 + ... + 27690.

It is an arithmetic number, because the mean of its divisors is an integer number (16011765).

Almost surely, 2^213189870 is an apocalyptic number.

213189870 is an abundant number, since it is smaller than the sum of its proper divisors (299186610).

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

213189870 is a wasteful number, since it uses less digits than its factorization.

213189870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 213189870 is about 14601.0229093718. The cubic root of 213189870 is about 597.3866617422.

The spelling of 213189870 in words is "two hundred thirteen million, one hundred eighty-nine thousand, eight hundred seventy".