197530864213 has 4 divisors (see below), whose sum is σ = 197538427180. Its totient is φ = 197523301248.

The previous prime is 197530864211. The next prime is 197530864249. The reversal of 197530864213 is 312468035791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143263764004 + 54267100209 = 378502^2 + 232953^2 .

It is a cyclic number.

It is not a de Polignac number, because 197530864213 - 2¹ = 197530864211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197530864211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3742170 + ... + 3794587.

It is an arithmetic number, because the mean of its divisors is an integer number (49384606795).

It is a 2-persistent number, because it is pandigital, and so is 2⋅197530864213 = 395061728426, but 3⋅197530864213 = 592592592639 is not.

Almost surely, 2^197530864213 is an apocalyptic number.

It is an amenable number.

197530864213 is a deficient number, since it is larger than the sum of its proper divisors (7562967).

197530864213 is an equidigital number, since it uses as much as digits as its factorization.

197530864213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7562966.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 197530864213 in words is "one hundred ninety-seven billion, five hundred thirty million, eight hundred sixty-four thousand, two hundred thirteen".