213737323237057 has 2 divisors, whose sum is σ = 213737323237058. Its totient is φ = 213737323237056.

The previous prime is 213737323237027. The next prime is 213737323237147. The reversal of 213737323237057 is 750732323737312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207367171262001 + 6370151975056 = 14400249^2 + 2523916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213737323237057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213737323236989 and 213737323237007.

It is not a weakly prime, because it can be changed into another prime (213737323237027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106868661618528 + 106868661618529.

It is an arithmetic number, because the mean of its divisors is an integer number (106868661618529).

Almost surely, 2^{213737323237057} is an apocalyptic number.

It is an amenable number.

213737323237057 is a deficient number, since it is larger than the sum of its proper divisors (1).

213737323237057 is an equidigital number, since it uses as much as digits as its factorization.

213737323237057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23337720, while the sum is 55.

The spelling of 213737323237057 in words is "two hundred thirteen trillion, seven hundred thirty-seven billion, three hundred twenty-three million, two hundred thirty-seven thousand, fifty-seven".