213181869623 has 2 divisors, whose sum is σ = 213181869624. Its totient is φ = 213181869622.

The previous prime is 213181869577. The next prime is 213181869629. The reversal of 213181869623 is 326968181312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213181869623 - 2²⁶ = 213114760759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213181869629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106590934811 + 106590934812.

It is an arithmetic number, because the mean of its divisors is an integer number (106590934812).

Almost surely, 2^213181869623 is an apocalyptic number.

213181869623 is a deficient number, since it is larger than the sum of its proper divisors (1).

213181869623 is an equidigital number, since it uses as much as digits as its factorization.

213181869623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The spelling of 213181869623 in words is "two hundred thirteen billion, one hundred eighty-one million, eight hundred sixty-nine thousand, six hundred twenty-three".