31660141 has 4 divisors (see below), whose sum is σ = 32751900. Its totient is φ = 30568384.

The previous prime is 31660129. The next prime is 31660147. The reversal of 31660141 is 14106613.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20967241 + 10692900 = 4579^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 31660141 - 2⁹ = 31659629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31660147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545836 + ... + 545893.

It is an arithmetic number, because the mean of its divisors is an integer number (8187975).

Almost surely, 2^31660141 is an apocalyptic number.

It is an amenable number.

31660141 is a deficient number, since it is larger than the sum of its proper divisors (1091759).

31660141 is a wasteful number, since it uses less digits than its factorization.

31660141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091758.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31660141 is about 5626.7344881379. The cubic root of 31660141 is about 316.3522649895.

Adding to 31660141 its reverse (14106613), we get a palindrome (45766754).

The spelling of 31660141 in words is "thirty-one million, six hundred sixty thousand, one hundred forty-one".