213831954 has 64 divisors (see below), whose sum is σ = 557779200. Its totient is φ = 59439744.

The previous prime is 213831953. The next prime is 213831971. The reversal of 213831954 is 459138312.

213831954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213831953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6342 + ... + 21630.

It is an arithmetic number, because the mean of its divisors is an integer number (8715300).

Almost surely, 2^213831954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213831954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278889600).

213831954 is an abundant number, since it is smaller than the sum of its proper divisors (343947246).

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

213831954 is a wasteful number, since it uses less digits than its factorization.

213831954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15344 (or 15338 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 213831954 is about 14622.9940162745. The cubic root of 213831954 is about 597.9857958692.

The spelling of 213831954 in words is "two hundred thirteen million, eight hundred thirty-one thousand, nine hundred fifty-four".