31661741 has 4 divisors (see below), whose sum is σ = 31674972. Its totient is φ = 31648512.

The previous prime is 31661737. The next prime is 31661753. The reversal of 31661741 is 14716613.

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 26728900 + 4932841 = 5170^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 31661741 - 2² = 31661737 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 (31661711) 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, 1910 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (7918743).

Almost surely, 2^31661741 is an apocalyptic number.

It is an amenable number.

31661741 is a deficient number, since it is larger than the sum of its proper divisors (13231).

31661741 is a wasteful number, since it uses less digits than its factorization.

31661741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230.

The product of its digits is 3024, while the sum is 29.

The square root of 31661741 is about 5626.8766647226. The cubic root of 31661741 is about 316.3575940361.

The spelling of 31661741 in words is "thirty-one million, six hundred sixty-one thousand, seven hundred forty-one".