30524981 has 4 divisors (see below), whose sum is σ = 30549312. Its totient is φ = 30500652.

The previous prime is 30524971. The next prime is 30524983. The reversal of 30524981 is 18942503.

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: 18942503 = 139 ⋅136277.

It is a cyclic number.

It is not a de Polignac number, because 30524981 - 2²² = 26330677 is a prime.

It is a super-2 number, since 2×30524981² = 1863548930100722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30524983) 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, 10175 + ... + 12828.

It is an arithmetic number, because the mean of its divisors is an integer number (7637328).

Almost surely, 2^30524981 is an apocalyptic number.

It is an amenable number.

30524981 is a deficient number, since it is larger than the sum of its proper divisors (24331).

30524981 is a wasteful number, since it uses less digits than its factorization.

30524981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24330.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 30524981 is about 5524.9417191496. The cubic root of 30524981 is about 312.5252664371.

The spelling of 30524981 in words is "thirty million, five hundred twenty-four thousand, nine hundred eighty-one".