213638463 has 24 divisors (see below), whose sum is σ = 312028080. Its totient is φ = 140849280.

The previous prime is 213638459. The next prime is 213638471. The reversal of 213638463 is 364836312.

213638463 is a `hidden beast` number, since 2 + 13 + 638 + 4 + 6 + 3 = 666.

It is not a de Polignac number, because 213638463 - 2² = 213638459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213638363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509668 + ... + 510086.

It is an arithmetic number, because the mean of its divisors is an integer number (13001170).

Almost surely, 2^213638463 is an apocalyptic number.

213638463 is a deficient number, since it is larger than the sum of its proper divisors (98389617).

213638463 is a wasteful number, since it uses less digits than its factorization.

213638463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 916 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 213638463 is about 14616.3765345588. The cubic root of 213638463 is about 597.8053741495.

The spelling of 213638463 in words is "two hundred thirteen million, six hundred thirty-eight thousand, four hundred sixty-three".