213095081 has 8 divisors (see below), whose sum is σ = 218521800. Its totient is φ = 207679360.

The previous prime is 213095053. The next prime is 213095087. The reversal of 213095081 is 180590312.

213095081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 111408025 + 101687056 = 10555^2 + 10084^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213095081 is a prime.

It is a super-2 number, since 2×213095081² = 90819027092793122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213095087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48275 + ... + 52503.

It is an arithmetic number, because the mean of its divisors is an integer number (27315225).

Almost surely, 2^213095081 is an apocalyptic number.

It is an amenable number.

213095081 is a deficient number, since it is larger than the sum of its proper divisors (5426719).

213095081 is a wasteful number, since it uses less digits than its factorization.

213095081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 213095081 is about 14597.7765772737. The cubic root of 213095081 is about 597.2981114455.

The spelling of 213095081 in words is "two hundred thirteen million, ninety-five thousand, eighty-one".