30531001213 has 4 divisors (see below), whose sum is σ = 30614192320. Its totient is φ = 30447810108.

The previous prime is 30531001201. The next prime is 30531001229. The reversal of 30531001213 is 31210013503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30531001213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531001273) 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, 41595003 + ... + 41595736.

It is an arithmetic number, because the mean of its divisors is an integer number (7653548080).

Almost surely, 2^30531001213 is an apocalyptic number.

It is an amenable number.

30531001213 is a deficient number, since it is larger than the sum of its proper divisors (83191107).

30531001213 is an equidigital number, since it uses as much as digits as its factorization.

30531001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83191106.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 30531001213 its reverse (31210013503), we get a palindrome (61741014716).

The spelling of 30531001213 in words is "thirty billion, five hundred thirty-one million, one thousand, two hundred thirteen".