30312421 has 8 divisors (see below), whose sum is σ = 30763800. Its totient is φ = 29863680.

The previous prime is 30312409. The next prime is 30312437. The reversal of 30312421 is 12421303.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 216225 + 30096196 = 465^2 + 5486^2 .

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 30312421 - 2⁹ = 30311909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30312395 and 30312404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312481) 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, 37065 + ... + 37873.

It is an arithmetic number, because the mean of its divisors is an integer number (3845475).

Almost surely, 2^30312421 is an apocalyptic number.

It is an amenable number.

30312421 is a deficient number, since it is larger than the sum of its proper divisors (451379).

30312421 is an equidigital number, since it uses as much as digits as its factorization.

30312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30312421 is about 5505.6717119712. The cubic root of 30312421 is about 311.7981552514.

Adding to 30312421 its reverse (12421303), we get a palindrome (42733724).

The spelling of 30312421 in words is "thirty million, three hundred twelve thousand, four hundred twenty-one".