213704267081 has 4 divisors (see below), whose sum is σ = 213731817600. Its totient is φ = 213676716564.

The previous prime is 213704266991. The next prime is 213704267083. The reversal of 213704267081 is 180762407312.

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 213704267081 - 2³⁰ = 212630525257 is a prime.

It is a super-2 number, since 2×213704267081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213704267083) 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, 13763621 + ... + 13779138.

It is an arithmetic number, because the mean of its divisors is an integer number (53432954400).

Almost surely, 2^213704267081 is an apocalyptic number.

It is an amenable number.

213704267081 is a deficient number, since it is larger than the sum of its proper divisors (27550519).

213704267081 is an equidigital number, since it uses as much as digits as its factorization.

213704267081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27550518.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 213704267081 in words is "two hundred thirteen billion, seven hundred four million, two hundred sixty-seven thousand, eighty-one".