213290181 has 24 divisors (see below), whose sum is σ = 349250720. Its totient is φ = 124346016.

The previous prime is 213290167. The next prime is 213290197. The reversal of 213290181 is 181092312.

213290181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213290181 - 2⁶ = 213290117 is a prime.

It is a super-2 number, since 2×213290181² = 90985402622025522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213290101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45751 + ... + 50196.

Almost surely, 2^213290181 is an apocalyptic number.

It is an amenable number.

213290181 is a deficient number, since it is larger than the sum of its proper divisors (135960539).

213290181 is a wasteful number, since it uses less digits than its factorization.

213290181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95985 (or 95982 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 213290181 is about 14604.4575729467. The cubic root of 213290181 is about 597.4803420177.

The spelling of 213290181 in words is "two hundred thirteen million, two hundred ninety thousand, one hundred eighty-one".