211193632493 has 2 divisors, whose sum is σ = 211193632494. Its totient is φ = 211193632492.

The previous prime is 211193632477. The next prime is 211193632519. The reversal of 211193632493 is 394236391112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206372135524 + 4821496969 = 454282^2 + 69437^2 .

It is a cyclic number.

It is not a de Polignac number, because 211193632493 - 2⁴ = 211193632477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211193632393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105596816246 + 105596816247.

It is an arithmetic number, because the mean of its divisors is an integer number (105596816247).

Almost surely, 2^211193632493 is an apocalyptic number.

It is an amenable number.

211193632493 is a deficient number, since it is larger than the sum of its proper divisors (1).

211193632493 is an equidigital number, since it uses as much as digits as its factorization.

211193632493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The spelling of 211193632493 in words is "two hundred eleven billion, one hundred ninety-three million, six hundred thirty-two thousand, four hundred ninety-three".