30520081 has 4 divisors (see below), whose sum is σ = 30680064. Its totient is φ = 30360100.

The previous prime is 30520073. The next prime is 30520097. The reversal of 30520081 is 18002503.

It is a happy number.

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: 18002503 = 61 ⋅295123.

It is a cyclic number.

It is not a de Polignac number, because 30520081 - 2³ = 30520073 is a prime.

It is a super-2 number, since 2×30520081² = 1862950688493122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30520181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79705 + ... + 80086.

It is an arithmetic number, because the mean of its divisors is an integer number (7670016).

Almost surely, 2^30520081 is an apocalyptic number.

It is an amenable number.

30520081 is a deficient number, since it is larger than the sum of its proper divisors (159983).

30520081 is a wasteful number, since it uses less digits than its factorization.

30520081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159982.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 30520081 is about 5524.4982577606. The cubic root of 30520081 is about 312.5085429131.

Adding to 30520081 its reverse (18002503), we get a palindrome (48522584).

It can be divided in two parts, 3052008 and 1, that added together give a square (3052009 = 1747²).

The spelling of 30520081 in words is "thirty million, five hundred twenty thousand, eighty-one".