31988241 has 12 divisors (see below), whose sum is σ = 47332740. Its totient is φ = 20805120.

The previous prime is 31988221. The next prime is 31988251. The reversal of 31988241 is 14288913.

It can be written as a sum of positive squares in 2 ways, for example, as 1782225 + 30206016 = 1335^2 + 5496^2 .

It is not a de Polignac number, because 31988241 - 2¹¹ = 31986193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31988196 and 31988205.

It is not an unprimeable number, because it can be changed into a prime (31988221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42976 + ... + 43713.

It is an arithmetic number, because the mean of its divisors is an integer number (3944395).

Almost surely, 2^31988241 is an apocalyptic number.

It is an amenable number.

31988241 is a deficient number, since it is larger than the sum of its proper divisors (15344499).

31988241 is a wasteful number, since it uses less digits than its factorization.

31988241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86736 (or 86733 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 31988241 is about 5655.8147954119. The cubic root of 31988241 is about 317.4413176106.

The spelling of 31988241 in words is "thirty-one million, nine hundred eighty-eight thousand, two hundred forty-one".