213277681537 has 2 divisors, whose sum is σ = 213277681538. Its totient is φ = 213277681536.

The previous prime is 213277681523. The next prime is 213277681601. The reversal of 213277681537 is 735186772312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204589763856 + 8687917681 = 452316^2 + 93209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213277681537 is a prime.

It is not a weakly prime, because it can be changed into another prime (213277651537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106638840768 + 106638840769.

It is an arithmetic number, because the mean of its divisors is an integer number (106638840769).

Almost surely, 2^213277681537 is an apocalyptic number.

It is an amenable number.

213277681537 is a deficient number, since it is larger than the sum of its proper divisors (1).

213277681537 is an equidigital number, since it uses as much as digits as its factorization.

213277681537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The spelling of 213277681537 in words is "two hundred thirteen billion, two hundred seventy-seven million, six hundred eighty-one thousand, five hundred thirty-seven".