30661231 has 8 divisors (see below), whose sum is σ = 33678720. Its totient is φ = 27784152.

The previous prime is 30661187. The next prime is 30661237. The reversal of 30661231 is 13216603.

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 30661231 - 2¹¹ = 30659183 is a prime.

It is a super-2 number, since 2×30661231² = 1880222172870722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34645 + ... + 35518.

It is an arithmetic number, because the mean of its divisors is an integer number (4209840).

Almost surely, 2^30661231 is an apocalyptic number.

30661231 is a deficient number, since it is larger than the sum of its proper divisors (3017489).

30661231 is a wasteful number, since it uses less digits than its factorization.

30661231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70205.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30661231 is about 5537.2584371691. The cubic root of 30661231 is about 312.9895677810.

Adding to 30661231 its reverse (13216603), we get a palindrome (43877834).

The spelling of 30661231 in words is "thirty million, six hundred sixty-one thousand, two hundred thirty-one".