30492481 has 4 divisors (see below), whose sum is σ = 30513600. Its totient is φ = 30471364.

The previous prime is 30492467. The next prime is 30492491. The reversal of 30492481 is 18429403.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18429403 = 83 ⋅222041.

It is a cyclic number.

It is not a de Polignac number, because 30492481 - 2⁷ = 30492353 is a prime.

It is a super-2 number, since 2×30492481² = 1859582795070722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30492431) 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, 8221 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (7628400).

Almost surely, 2^30492481 is an apocalyptic number.

It is an amenable number.

30492481 is a deficient number, since it is larger than the sum of its proper divisors (21119).

30492481 is a wasteful number, since it uses less digits than its factorization.

30492481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21118.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 30492481 is about 5521.9997283593. Note that the first 3 decimals coincide. The cubic root of 30492481 is about 312.4143116528.

The spelling of 30492481 in words is "thirty million, four hundred ninety-two thousand, four hundred eighty-one".