31067661 has 8 divisors (see below), whose sum is σ = 41488864. Its totient is φ = 20679120.

The previous prime is 31067639. The next prime is 31067713. The reversal of 31067661 is 16676013.

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

It is not a de Polignac number, because 31067661 - 2¹⁴ = 31051277 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 (31066661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5851 + ... + 9816.

It is an arithmetic number, because the mean of its divisors is an integer number (5186108).

Almost surely, 2^31067661 is an apocalyptic number.

It is an amenable number.

31067661 is a deficient number, since it is larger than the sum of its proper divisors (10421203).

31067661 is a wasteful number, since it uses less digits than its factorization.

31067661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16331.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 31067661 is about 5573.8371881497. The cubic root of 31067661 is about 314.3664464286.

The spelling of 31067661 in words is "thirty-one million, sixty-seven thousand, six hundred sixty-one".