213430220537 has 2 divisors, whose sum is σ = 213430220538. Its totient is φ = 213430220536.

The previous prime is 213430220527. The next prime is 213430220573. The reversal of 213430220537 is 735022034312.

It is a happy number.

Together with next prime (213430220573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205114786816 + 8315433721 = 452896^2 + 91189^2 .

It is a cyclic number.

It is not a de Polignac number, because 213430220537 - 2⁶ = 213430220473 is a prime.

It is not a weakly prime, because it can be changed into another prime (213430220527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106715110268 + 106715110269.

It is an arithmetic number, because the mean of its divisors is an integer number (106715110269).

Almost surely, 2^213430220537 is an apocalyptic number.

It is an amenable number.

213430220537 is a deficient number, since it is larger than the sum of its proper divisors (1).

213430220537 is an equidigital number, since it uses as much as digits as its factorization.

213430220537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 213430220537 its reverse (735022034312), we get a palindrome (948452254849).

The spelling of 213430220537 in words is "two hundred thirteen billion, four hundred thirty million, two hundred twenty thousand, five hundred thirty-seven".