213112450531 has 2 divisors, whose sum is σ = 213112450532. Its totient is φ = 213112450530.

The previous prime is 213112450513. The next prime is 213112450559. The reversal of 213112450531 is 135054211312.

Together with previous prime (213112450513) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (213112450559) can be obtained adding 213112450531 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213112450531 - 2⁷ = 213112450403 is a prime.

It is a super-2 number, since 2×213112450531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213112450531.

It is not a weakly prime, because it can be changed into another prime (213112450511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556225265 + 106556225266.

It is an arithmetic number, because the mean of its divisors is an integer number (106556225266).

Almost surely, 2^213112450531 is an apocalyptic number.

213112450531 is a deficient number, since it is larger than the sum of its proper divisors (1).

213112450531 is an equidigital number, since it uses as much as digits as its factorization.

213112450531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 213112450531 its reverse (135054211312), we get a palindrome (348166661843).

The spelling of 213112450531 in words is "two hundred thirteen billion, one hundred twelve million, four hundred fifty thousand, five hundred thirty-one".