213343131 has 8 divisors (see below), whose sum is σ = 291395664. Its totient is φ = 138759680.

The previous prime is 213343103. The next prime is 213343139. The reversal of 213343131 is 131343312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213343131 - 2⁵ = 213343099 is a prime.

It is a super-2 number, since 2×213343131² = 91030583089766322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213343098 and 213343107.

It is not an unprimeable number, because it can be changed into a prime (213343139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867126 + ... + 867371.

It is an arithmetic number, because the mean of its divisors is an integer number (36424458).

Almost surely, 2^213343131 is an apocalyptic number.

213343131 is a deficient number, since it is larger than the sum of its proper divisors (78052533).

213343131 is a wasteful number, since it uses less digits than its factorization.

213343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734541.

The product of its digits is 648, while the sum is 21.

The square root of 213343131 is about 14606.2702631438. The cubic root of 213343131 is about 597.5297800905.

Adding to 213343131 its reverse (131343312), we get a palindrome (344686443).

The spelling of 213343131 in words is "two hundred thirteen million, three hundred forty-three thousand, one hundred thirty-one".