213143388 has 24 divisors (see below), whose sum is σ = 514484880. Its totient is φ = 68597760.

The previous prime is 213143377. The next prime is 213143393. The reversal of 213143388 is 883341312.

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, 305893 + ... + 306588.

It is an arithmetic number, because the mean of its divisors is an integer number (21436870).

Almost surely, 2^213143388 is an apocalyptic number.

It is an amenable number.

213143388 is an abundant number, since it is smaller than the sum of its proper divisors (301341492).

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

213143388 is a wasteful number, since it uses less digits than its factorization.

213143388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612517 (or 612515 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 213143388 is about 14599.4310848060. The cubic root of 213143388 is about 597.3432423165.

It can be divided in two parts, 213143 and 388, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 213143388 in words is "two hundred thirteen million, one hundred forty-three thousand, three hundred eighty-eight".