213309031 has 8 divisors (see below), whose sum is σ = 230051360. Its totient is φ = 196614432.

The previous prime is 213309023. The next prime is 213309079. The reversal of 213309031 is 130903312.

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 213309031 - 2³ = 213309023 is a prime.

It is a super-2 number, since 2×213309031² = 91001485412317922, 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 = 213308993 and 213309011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213309001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2355 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (28756420).

Almost surely, 2^213309031 is an apocalyptic number.

213309031 is a deficient number, since it is larger than the sum of its proper divisors (16742329).

213309031 is a wasteful number, since it uses less digits than its factorization.

213309031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23865.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 213309031 is about 14605.1029095998. The cubic root of 213309031 is about 597.4979427227.

The spelling of 213309031 in words is "two hundred thirteen million, three hundred nine thousand, thirty-one".