30661071 has 32 divisors (see below), whose sum is σ = 48384000. Its totient is φ = 16907520.

The previous prime is 30661067. The next prime is 30661073. The reversal of 30661071 is 17016603.

It is not a de Polignac number, because 30661071 - 2² = 30661067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661073) 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 31 ways as a sum of consecutive naturals, for example, 128170 + ... + 128408.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^30661071 is an apocalyptic number.

30661071 is a deficient number, since it is larger than the sum of its proper divisors (17722929).

30661071 is a wasteful number, since it uses less digits than its factorization.

30661071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 30661071 is about 5537.2439895674. The cubic root of 30661071 is about 312.9890233539.

Adding to 30661071 its reverse (17016603), we get a palindrome (47677674).

The spelling of 30661071 in words is "thirty million, six hundred sixty-one thousand, seventy-one".