31172241 has 16 divisors (see below), whose sum is σ = 43282304. Its totient is φ = 19937664.

The previous prime is 31172209. The next prime is 31172243. The reversal of 31172241 is 14227113.

It is not a de Polignac number, because 31172241 - 2⁵ = 31172209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31172243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6180 + ... + 10026.

It is an arithmetic number, because the mean of its divisors is an integer number (2705144).

Almost surely, 2^31172241 is an apocalyptic number.

It is an amenable number.

31172241 is a deficient number, since it is larger than the sum of its proper divisors (12110063).

31172241 is a wasteful number, since it uses less digits than its factorization.

31172241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its digits is 336, while the sum is 21.

The square root of 31172241 is about 5583.2106354677. The cubic root of 31172241 is about 314.7187916129.

Adding to 31172241 its reverse (14227113), we get a palindrome (45399354).

It can be divided in two parts, 31172 and 241, that added together give a palindrome (31413).

The spelling of 31172241 in words is "thirty-one million, one hundred seventy-two thousand, two hundred forty-one".