213204881 has 2 divisors, whose sum is σ = 213204882. Its totient is φ = 213204880.

The previous prime is 213204877. The next prime is 213204907. The reversal of 213204881 is 188402312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108347281 + 104857600 = 10409^2 + 10240^2 .

It is a cyclic number.

It is not a de Polignac number, because 213204881 - 2² = 213204877 is a prime.

It is a super-2 number, since 2×213204881² = 90912642564448322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213204851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106602440 + 106602441.

It is an arithmetic number, because the mean of its divisors is an integer number (106602441).

Almost surely, 2^213204881 is an apocalyptic number.

It is an amenable number.

213204881 is a deficient number, since it is larger than the sum of its proper divisors (1).

213204881 is an equidigital number, since it uses as much as digits as its factorization.

213204881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 213204881 is about 14601.5369396513. The cubic root of 213204881 is about 597.4006823595.

The spelling of 213204881 in words is "two hundred thirteen million, two hundred four thousand, eight hundred eighty-one".