30312101 has 4 divisors (see below), whose sum is σ = 30739104. Its totient is φ = 29885100.

The previous prime is 30312089. The next prime is 30312103. The reversal of 30312101 is 10121303.

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-30312101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213395 + ... + 213536.

It is an arithmetic number, because the mean of its divisors is an integer number (7684776).

Almost surely, 2^30312101 is an apocalyptic number.

It is an amenable number.

30312101 is a deficient number, since it is larger than the sum of its proper divisors (427003).

30312101 is an equidigital number, since it uses as much as digits as its factorization.

30312101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427002.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 30312101 is about 5505.6426509537. The cubic root of 30312101 is about 311.7970580580.

Adding to 30312101 its reverse (10121303), we get a palindrome (40433404).

The spelling of 30312101 in words is "thirty million, three hundred twelve thousand, one hundred one".