213332131 has 4 divisors (see below), whose sum is σ = 213398752. Its totient is φ = 213265512.

The previous prime is 213332101. The next prime is 213332137. The reversal of 213332131 is 131233312.

213332131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213332131 - 2⁹ = 213331619 is a prime.

It is a super-3 number, since 3×213332131³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213332099 and 213332108.

It is not an unprimeable number, because it can be changed into a prime (213332137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28251 + ... + 34996.

It is an arithmetic number, because the mean of its divisors is an integer number (53349688).

Almost surely, 2^213332131 is an apocalyptic number.

213332131 is a deficient number, since it is larger than the sum of its proper divisors (66621).

213332131 is an equidigital number, since it uses as much as digits as its factorization.

213332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66620.

The product of its digits is 324, while the sum is 19.

The square root of 213332131 is about 14605.8937076784. The cubic root of 213332131 is about 597.5195103425.

Adding to 213332131 its reverse (131233312), we get a palindrome (344565443).

The spelling of 213332131 in words is "two hundred thirteen million, three hundred thirty-two thousand, one hundred thirty-one".