213796287 has 8 divisors (see below), whose sum is σ = 316735280. Its totient is φ = 142530840.

The previous prime is 213796283. The next prime is 213796291. The reversal of 213796287 is 782697312.

213796287 is a `hidden beast` number, since 2 + 13 + 7 + 9 + 628 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (213796283) and next prime (213796291).

It is not a de Polignac number, because 213796287 - 2² = 213796283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213796283) 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, 3959164 + ... + 3959217.

It is an arithmetic number, because the mean of its divisors is an integer number (39591910).

Almost surely, 2^213796287 is an apocalyptic number.

213796287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

213796287 is a deficient number, since it is larger than the sum of its proper divisors (102938993).

213796287 is an equidigital number, since it uses as much as digits as its factorization.

213796287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7918390 (or 7918384 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 213796287 is about 14621.7744135245. The cubic root of 213796287 is about 597.9525461686.

The spelling of 213796287 in words is "two hundred thirteen million, seven hundred ninety-six thousand, two hundred eighty-seven".