213523674 has 128 divisors (see below), whose sum is σ = 561254400. Its totient is φ = 53710272.

The previous prime is 213523669. The next prime is 213523711. The reversal of 213523674 is 476325312.

213523674 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 615169 + ... + 615515.

It is an arithmetic number, because the mean of its divisors is an integer number (4384800).

Almost surely, 2^213523674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213523674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280627200).

213523674 is an abundant number, since it is smaller than the sum of its proper divisors (347730726).

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

213523674 is a wasteful number, since it uses less digits than its factorization.

213523674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 395 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 213523674 is about 14612.4492813491. The cubic root of 213523674 is about 597.6982870423.

Adding to 213523674 its reverse (476325312), we get a palindrome (689848986).

The spelling of 213523674 in words is "two hundred thirteen million, five hundred twenty-three thousand, six hundred seventy-four".