30849561 has 12 divisors (see below), whose sum is σ = 44641792. Its totient is φ = 20528856.

The previous prime is 30849517. The next prime is 30849569. The reversal of 30849561 is 16594803.

It is a de Polignac number, because none of the positive numbers 2^k-30849561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30849569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2640 + ... + 8286.

Almost surely, 2^30849561 is an apocalyptic number.

It is an amenable number.

30849561 is a deficient number, since it is larger than the sum of its proper divisors (13792231).

30849561 is a wasteful number, since it uses less digits than its factorization.

30849561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260 (or 6257 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 30849561 is about 5554.2381115685. The cubic root of 30849561 is about 313.6290838432.

The spelling of 30849561 in words is "thirty million, eight hundred forty-nine thousand, five hundred sixty-one".