213908794441 has 4 divisors (see below), whose sum is σ = 223209176832. Its totient is φ = 204608412052.

The previous prime is 213908794427. The next prime is 213908794459. The reversal of 213908794441 is 144497809312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213908794441 - 2⁵ = 213908794409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213908794741) 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, 4650191161 + ... + 4650191206.

It is an arithmetic number, because the mean of its divisors is an integer number (55802294208).

Almost surely, 2^213908794441 is an apocalyptic number.

It is an amenable number.

213908794441 is a deficient number, since it is larger than the sum of its proper divisors (9300382391).

213908794441 is an equidigital number, since it uses as much as digits as its factorization.

213908794441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9300382390.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 213908794441 in words is "two hundred thirteen billion, nine hundred eight million, seven hundred ninety-four thousand, four hundred forty-one".