213954287 has 2 divisors, whose sum is σ = 213954288. Its totient is φ = 213954286.

The previous prime is 213954241. The next prime is 213954317. The reversal of 213954287 is 782459312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213954287 - 2¹⁰ = 213953263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213954787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106977143 + 106977144.

It is an arithmetic number, because the mean of its divisors is an integer number (106977144).

Almost surely, 2^213954287 is an apocalyptic number.

213954287 is a deficient number, since it is larger than the sum of its proper divisors (1).

213954287 is an equidigital number, since it uses as much as digits as its factorization.

213954287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 213954287 is about 14627.1763167058. The cubic root of 213954287 is about 598.0998097777.

The spelling of 213954287 in words is "two hundred thirteen million, nine hundred fifty-four thousand, two hundred eighty-seven".