213541331 has 4 divisors (see below), whose sum is σ = 214955664. Its totient is φ = 212127000.

The previous prime is 213541327. The next prime is 213541333. The reversal of 213541331 is 133145312.

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 213541331 - 2² = 213541327 is a prime.

It is a super-2 number, since 2×213541331² = 91199800090503122, 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 = 213541297 and 213541306.

It is not an unprimeable number, because it can be changed into a prime (213541333) 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, 706940 + ... + 707241.

It is an arithmetic number, because the mean of its divisors is an integer number (53738916).

Almost surely, 2^213541331 is an apocalyptic number.

213541331 is a deficient number, since it is larger than the sum of its proper divisors (1414333).

213541331 is a wasteful number, since it uses less digits than its factorization.

213541331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414332.

The product of its digits is 1080, while the sum is 23.

The square root of 213541331 is about 14613.0534454644. The cubic root of 213541331 is about 597.7147618240.

Adding to 213541331 its reverse (133145312), we get a palindrome (346686643).

The spelling of 213541331 in words is "two hundred thirteen million, five hundred forty-one thousand, three hundred thirty-one".