213686495 has 16 divisors (see below), whose sum is σ = 284480640. Its totient is φ = 152772000.

The previous prime is 213686453. The next prime is 213686497. The reversal of 213686495 is 594686312.

It is a de Polignac number, because none of the positive numbers 2^k-213686495 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213686497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29681 + ... + 36170.

It is an arithmetic number, because the mean of its divisors is an integer number (17780040).

Almost surely, 2^213686495 is an apocalyptic number.

213686495 is a deficient number, since it is larger than the sum of its proper divisors (70794145).

213686495 is a wasteful number, since it uses less digits than its factorization.

213686495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65926.

The product of its digits is 311040, while the sum is 44.

The square root of 213686495 is about 14618.0195307025. The cubic root of 213686495 is about 597.8501720067.

The spelling of 213686495 in words is "two hundred thirteen million, six hundred eighty-six thousand, four hundred ninety-five".