30312461 has 4 divisors (see below), whose sum is σ = 30505692. Its totient is φ = 30119232.

The previous prime is 30312437. The next prime is 30312473. The reversal of 30312461 is 16421303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5262436 + 25050025 = 2294^2 + 5005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312461 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 (30312481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96380 + ... + 96693.

It is an arithmetic number, because the mean of its divisors is an integer number (7626423).

Almost surely, 2^30312461 is an apocalyptic number.

It is an amenable number.

30312461 is a deficient number, since it is larger than the sum of its proper divisors (193231).

30312461 is a wasteful number, since it uses less digits than its factorization.

30312461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193230.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30312461 is about 5505.6753445876. The cubic root of 30312461 is about 311.7982924000.

Adding to 30312461 its reverse (16421303), we get a palindrome (46733764).

The spelling of 30312461 in words is "thirty million, three hundred twelve thousand, four hundred sixty-one".