30961305 has 16 divisors (see below), whose sum is σ = 55042560. Its totient is φ = 16512624.

The previous prime is 30961283. The next prime is 30961313. The reversal of 30961305 is 50316903.

It is not a de Polignac number, because 30961305 - 2⁹ = 30960793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114537 + ... + 114806.

It is an arithmetic number, because the mean of its divisors is an integer number (3440160).

Almost surely, 2^30961305 is an apocalyptic number.

It is an amenable number.

30961305 is a deficient number, since it is larger than the sum of its proper divisors (24081255).

30961305 is a wasteful number, since it uses less digits than its factorization.

30961305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229357 (or 229351 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 30961305 is about 5564.2883642026. The cubic root of 30961305 is about 314.0073057383.

The spelling of 30961305 in words is "thirty million, nine hundred sixty-one thousand, three hundred five".