30906565 has 8 divisors (see below), whose sum is σ = 37696248. Its totient is φ = 24319680.

The previous prime is 30906553. The next prime is 30906587. The reversal of 30906565 is 56560903.

It can be written as a sum of positive squares in 4 ways, for example, as 1595169 + 29311396 = 1263^2 + 5414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30906565 - 2²¹ = 28809413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30906565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50362 + ... + 50971.

It is an arithmetic number, because the mean of its divisors is an integer number (4712031).

Almost surely, 2^30906565 is an apocalyptic number.

It is an amenable number.

30906565 is a deficient number, since it is larger than the sum of its proper divisors (6789683).

30906565 is a wasteful number, since it uses less digits than its factorization.

30906565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101399.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 30906565 is about 5559.3673201184. The cubic root of 30906565 is about 313.8221402028.

The spelling of 30906565 in words is "thirty million, nine hundred six thousand, five hundred sixty-five".