30131666 has 8 divisors (see below), whose sum is σ = 46050444. Its totient is φ = 14781520.

The previous prime is 30131603. The next prime is 30131669. The reversal of 30131666 is 66613103.

It can be written as a sum of positive squares in 2 ways, for example, as 30019441 + 112225 = 5479^2 + 335^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30131669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142025 + ... + 142236.

Almost surely, 2^30131666 is an apocalyptic number.

30131666 is a deficient number, since it is larger than the sum of its proper divisors (15918778).

30131666 is a wasteful number, since it uses less digits than its factorization.

30131666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284316.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 30131666 is about 5489.2318223956. The cubic root of 30131666 is about 311.1771614958.

Adding to 30131666 its reverse (66613103), we get a palindrome (96744769).

The spelling of 30131666 in words is "thirty million, one hundred thirty-one thousand, six hundred sixty-six".