213343552537 has 2 divisors, whose sum is σ = 213343552538. Its totient is φ = 213343552536.

The previous prime is 213343552519. The next prime is 213343552579. The reversal of 213343552537 is 735255343312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147345428736 + 65998123801 = 383856^2 + 256901^2 .

It is a cyclic number.

It is not a de Polignac number, because 213343552537 - 2¹⁵ = 213343519769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213343552493 and 213343552502.

It is not a weakly prime, because it can be changed into another prime (213343552837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106671776268 + 106671776269.

It is an arithmetic number, because the mean of its divisors is an integer number (106671776269).

Almost surely, 2^213343552537 is an apocalyptic number.

It is an amenable number.

213343552537 is a deficient number, since it is larger than the sum of its proper divisors (1).

213343552537 is an equidigital number, since it uses as much as digits as its factorization.

213343552537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 43.

Adding to 213343552537 its reverse (735255343312), we get a palindrome (948598895849).

The spelling of 213343552537 in words is "two hundred thirteen billion, three hundred forty-three million, five hundred fifty-two thousand, five hundred thirty-seven".