31116623 has 8 divisors (see below), whose sum is σ = 33884400. Its totient is φ = 28461888.

The previous prime is 31116619. The next prime is 31116637. The reversal of 31116623 is 32661113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31116623 - 2² = 31116619 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 (31116643) 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, 27686 + ... + 28787.

It is an arithmetic number, because the mean of its divisors is an integer number (4235550).

Almost surely, 2^31116623 is an apocalyptic number.

31116623 is a deficient number, since it is larger than the sum of its proper divisors (2767777).

31116623 is a wasteful number, since it uses less digits than its factorization.

31116623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56521.

The product of its digits is 648, while the sum is 23.

The square root of 31116623 is about 5578.2275858914. The cubic root of 31116623 is about 314.5315047850.

Adding to 31116623 its reverse (32661113), we get a palindrome (63777736).

The spelling of 31116623 in words is "thirty-one million, one hundred sixteen thousand, six hundred twenty-three".