213481564 has 24 divisors (see below), whose sum is σ = 389434640. Its totient is φ = 102301056.

The previous prime is 213481559. The next prime is 213481591. The reversal of 213481564 is 465184312.

It is a super-3 number, since 3×213481564³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849 + ... + 20680.

Almost surely, 2^213481564 is an apocalyptic number.

It is an amenable number.

213481564 is a deficient number, since it is larger than the sum of its proper divisors (175953076).

213481564 is a wasteful number, since it uses less digits than its factorization.

213481564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21637 (or 21635 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 213481564 is about 14611.0083156502. The cubic root of 213481564 is about 597.6589928364.

The spelling of 213481564 in words is "two hundred thirteen million, four hundred eighty-one thousand, five hundred sixty-four".