30661265 has 8 divisors (see below), whose sum is σ = 38062440. Its totient is φ = 23683072.

The previous prime is 30661259. The next prime is 30661273. The reversal of 30661265 is 56216603.

It can be written as a sum of positive squares in 4 ways, for example, as 146689 + 30514576 = 383^2 + 5524^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30661265 - 2¹⁰ = 30660241 is a prime.

It is a super-2 number, since 2×30661265² = 1880226342800450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 105584 + ... + 105873.

It is an arithmetic number, because the mean of its divisors is an integer number (4757805).

Almost surely, 2^30661265 is an apocalyptic number.

It is an amenable number.

30661265 is a deficient number, since it is larger than the sum of its proper divisors (7401175).

30661265 is a wasteful number, since it uses less digits than its factorization.

30661265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211491.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 30661265 is about 5537.2615072796. The cubic root of 30661265 is about 312.9896834715.

Adding to 30661265 its reverse (56216603), we get a palindrome (86877868).

The spelling of 30661265 in words is "thirty million, six hundred sixty-one thousand, two hundred sixty-five".