213015143 has 4 divisors (see below), whose sum is σ = 232380168. Its totient is φ = 193650120.

The previous prime is 213015133. The next prime is 213015157. The reversal of 213015143 is 341510312.

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

It is a cyclic number.

It is not a de Polignac number, because 213015143 - 2⁶ = 213015079 is a prime.

It is a super-2 number, since 2×213015143² = 90750902294620898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213015133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9682496 + ... + 9682517.

It is an arithmetic number, because the mean of its divisors is an integer number (58095042).

Almost surely, 2^213015143 is an apocalyptic number.

213015143 is a deficient number, since it is larger than the sum of its proper divisors (19365025).

213015143 is a wasteful number, since it uses less digits than its factorization.

213015143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19365024.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 213015143 is about 14595.0383007377. The cubic root of 213015143 is about 597.2234142918.

Adding to 213015143 its reverse (341510312), we get a palindrome (554525455).

The spelling of 213015143 in words is "two hundred thirteen million, fifteen thousand, one hundred forty-three".