31072641 has 8 divisors (see below), whose sum is σ = 41467200. Its totient is φ = 20696592.

The previous prime is 31072631. The next prime is 31072649. The reversal of 31072641 is 14627013.

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

It is not a de Polignac number, because 31072641 - 2⁶ = 31072577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31072649) 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, 66 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (5183400).

Almost surely, 2^31072641 is an apocalyptic number.

It is an amenable number.

31072641 is a deficient number, since it is larger than the sum of its proper divisors (10394559).

31072641 is a wasteful number, since it uses less digits than its factorization.

31072641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 31072641 is about 5574.2839001974. The cubic root of 31072641 is about 314.3832426856.

Adding to 31072641 its reverse (14627013), we get a palindrome (45699654).

It can be divided in two parts, 31072 and 641, that added together give a palindrome (31713).

The spelling of 31072641 in words is "thirty-one million, seventy-two thousand, six hundred forty-one".