30999245 has 16 divisors (see below), whose sum is σ = 39538368. Its totient is φ = 23251200.

The previous prime is 30999217. The next prime is 30999247. The reversal of 30999245 is 54299903.

It is not a de Polignac number, because 30999245 - 2¹² = 30995149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30999247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28970 + ... + 30020.

It is an arithmetic number, because the mean of its divisors is an integer number (2471148).

Almost surely, 2^30999245 is an apocalyptic number.

It is an amenable number.

30999245 is a deficient number, since it is larger than the sum of its proper divisors (8539123).

30999245 is a wasteful number, since it uses less digits than its factorization.

30999245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 30999245 is about 5567.6965614157. The cubic root of 30999245 is about 314.1355149578.

The spelling of 30999245 in words is "thirty million, nine hundred ninety-nine thousand, two hundred forty-five".