213331734 has 96 divisors (see below), whose sum is σ = 606677760. Its totient is φ = 52488000.

The previous prime is 213331717. The next prime is 213331747. The reversal of 213331734 is 437133312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213331698 and 213331707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22284 + ... + 30384.

It is an arithmetic number, because the mean of its divisors is an integer number (6319560).

Almost surely, 2^213331734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213331734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303338880).

213331734 is an abundant number, since it is smaller than the sum of its proper divisors (393346026).

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

213331734 is a wasteful number, since it uses less digits than its factorization.

213331734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146 (or 8143 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 213331734 is about 14605.8801172678. The cubic root of 213331734 is about 597.5191396914.

The spelling of 213331734 in words is "two hundred thirteen million, three hundred thirty-one thousand, seven hundred thirty-four".