213566463 has 40 divisors (see below), whose sum is σ = 349682256. Its totient is φ = 128822400.

The previous prime is 213566413. The next prime is 213566491. The reversal of 213566463 is 364665312.

213566463 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 6 + 646 + 3 = 666.

It is not a de Polignac number, because 213566463 - 2⁶ = 213566399 is a prime.

It is a super-2 number, since 2×213566463² = 91221268236660738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213566413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 249945 + ... + 250797.

Almost surely, 2^213566463 is an apocalyptic number.

213566463 is a deficient number, since it is larger than the sum of its proper divisors (136115793).

213566463 is a wasteful number, since it uses less digits than its factorization.

213566463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1148 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 213566463 is about 14613.9133362697. The cubic root of 213566463 is about 597.7382095535.

The spelling of 213566463 in words is "two hundred thirteen million, five hundred sixty-six thousand, four hundred sixty-three".