213030031 has 4 divisors (see below), whose sum is σ = 214039864. Its totient is φ = 212020200.

The previous prime is 213030029. The next prime is 213030067. The reversal of 213030031 is 130030312.

213030031 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 213030031 - 2¹ = 213030029 is a prime.

It is a super-2 number, since 2×213030031² = 90763588215721922, 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 = 213029993 and 213030020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213030011) 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, 504600 + ... + 505021.

It is an arithmetic number, because the mean of its divisors is an integer number (53509966).

Almost surely, 2^213030031 is an apocalyptic number.

213030031 is a deficient number, since it is larger than the sum of its proper divisors (1009833).

213030031 is a wasteful number, since it uses less digits than its factorization.

213030031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009832.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 213030031 is about 14595.5483281718. The cubic root of 213030031 is about 597.2373276298.

Adding to 213030031 its reverse (130030312), we get a palindrome (343060343).

The spelling of 213030031 in words is "two hundred thirteen million, thirty thousand, thirty-one".