30285561 has 4 divisors (see below), whose sum is σ = 40380752. Its totient is φ = 20190372.

The previous prime is 30285529. The next prime is 30285581. The reversal of 30285561 is 16558203.

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.

It is not a de Polignac number, because 30285561 - 2⁵ = 30285529 is a prime.

It is a super-3 number, since 3×30285561³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30285581) 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, 5047591 + ... + 5047596.

It is an arithmetic number, because the mean of its divisors is an integer number (10095188).

Almost surely, 2^30285561 is an apocalyptic number.

It is an amenable number.

30285561 is a deficient number, since it is larger than the sum of its proper divisors (10095191).

30285561 is a wasteful number, since it uses less digits than its factorization.

30285561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095190.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 30285561 is about 5503.2318686386. The cubic root of 30285561 is about 311.7060326926.

The spelling of 30285561 in words is "thirty million, two hundred eighty-five thousand, five hundred sixty-one".