213523331 has 20 divisors (see below), whose sum is σ = 251619432. Its totient is φ = 181169856.

The previous prime is 213523313. The next prime is 213523369. The reversal of 213523331 is 133325312.

213523331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213523331 - 2²² = 209329027 is a prime.

It is a super-2 number, since 2×213523331² = 91184425762671122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213523297 and 213523306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213523391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 270920 + ... + 271706.

Almost surely, 2^213523331 is an apocalyptic number.

213523331 is a deficient number, since it is larger than the sum of its proper divisors (38096101).

213523331 is an frugal number, since it uses more digits than its factorization.

213523331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 907 counting only the distinct ones).

The product of its digits is 1620, while the sum is 23.

The square root of 213523331 is about 14612.4375447767. The cubic root of 213523331 is about 597.6979669987.

Adding to 213523331 its reverse (133325312), we get a palindrome (346848643).

The spelling of 213523331 in words is "two hundred thirteen million, five hundred twenty-three thousand, three hundred thirty-one".