213282491 has 2 divisors, whose sum is σ = 213282492. Its totient is φ = 213282490.

The previous prime is 213282431. The next prime is 213282497. The reversal of 213282491 is 194282312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213282491 - 2¹⁸ = 213020347 is a prime.

It is not a weakly prime, because it can be changed into another prime (213282497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106641245 + 106641246.

It is an arithmetic number, because the mean of its divisors is an integer number (106641246).

Almost surely, 2^213282491 is an apocalyptic number.

213282491 is a deficient number, since it is larger than the sum of its proper divisors (1).

213282491 is an equidigital number, since it uses as much as digits as its factorization.

213282491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 213282491 is about 14604.1942947908. The cubic root of 213282491 is about 597.4731613792.

The spelling of 213282491 in words is "two hundred thirteen million, two hundred eighty-two thousand, four hundred ninety-one".