213689466 has 48 divisors (see below), whose sum is σ = 495399840. Its totient is φ = 66368160.

The previous prime is 213689461. The next prime is 213689471. The reversal of 213689466 is 664986312.

It is an interprime number because it is at equal distance from previous prime (213689461) and next prime (213689471).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213689461) 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, 15741 + ... + 25983.

It is an arithmetic number, because the mean of its divisors is an integer number (10320830).

Almost surely, 2^213689466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213689466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247699920).

213689466 is an abundant number, since it is smaller than the sum of its proper divisors (281710374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213689466 is a wasteful number, since it uses less digits than its factorization.

213689466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331 (or 10328 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 213689466 is about 14618.1211515023. The cubic root of 213689466 is about 597.8529427397.

The spelling of 213689466 in words is "two hundred thirteen million, six hundred eighty-nine thousand, four hundred sixty-six".