213000531 has 16 divisors (see below), whose sum is σ = 301539744. Its totient is φ = 133277184.

The previous prime is 213000521. The next prime is 213000547. The reversal of 213000531 is 135000312.

It is a happy number.

It is not a de Polignac number, because 213000531 - 2⁶ = 213000467 is a prime.

It is a super-2 number, since 2×213000531² = 90738452412563922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213000531.

It is not an unprimeable number, because it can be changed into a prime (213000521) 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, 13425 + ... + 24621.

It is an arithmetic number, because the mean of its divisors is an integer number (18846234).

Almost surely, 2^213000531 is an apocalyptic number.

213000531 is a deficient number, since it is larger than the sum of its proper divisors (88539213).

213000531 is a wasteful number, since it uses less digits than its factorization.

213000531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11590.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 213000531 is about 14594.5377110753. The cubic root of 213000531 is about 597.2097582547.

Adding to 213000531 its reverse (135000312), we get a palindrome (348000843).

It can be divided in two parts, 213000 and 531, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 213000531 in words is "two hundred thirteen million, five hundred thirty-one", and thus it is an aban number.