31117641 has 8 divisors (see below), whose sum is σ = 41616864. Its totient is φ = 20681760.

The previous prime is 31117621. The next prime is 31117657. The reversal of 31117641 is 14671113.

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

It is not a de Polignac number, because 31117641 - 2⁶ = 31117577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31117621) 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 7 ways as a sum of consecutive naturals, for example, 14676 + ... + 16661.

It is an arithmetic number, because the mean of its divisors is an integer number (5202108).

Almost surely, 2^31117641 is an apocalyptic number.

It is an amenable number.

31117641 is a deficient number, since it is larger than the sum of its proper divisors (10499223).

31117641 is a wasteful number, since it uses less digits than its factorization.

31117641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31671.

The product of its digits is 504, while the sum is 24.

The square root of 31117641 is about 5578.3188327667. The cubic root of 31117641 is about 314.5349347800.

Adding to 31117641 its reverse (14671113), we get a palindrome (45788754).

The spelling of 31117641 in words is "thirty-one million, one hundred seventeen thousand, six hundred forty-one".