31020241 has 4 divisors (see below), whose sum is σ = 35451712. Its totient is φ = 26588772.

The previous prime is 31020233. The next prime is 31020247. The reversal of 31020241 is 14202013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31020241 - 2³ = 31020233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020247) 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 3 ways as a sum of consecutive naturals, for example, 2215725 + ... + 2215738.

It is an arithmetic number, because the mean of its divisors is an integer number (8862928).

Almost surely, 2^31020241 is an apocalyptic number.

It is an amenable number.

31020241 is a deficient number, since it is larger than the sum of its proper divisors (4431471).

31020241 is an equidigital number, since it uses as much as digits as its factorization.

31020241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431470.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31020241 is about 5569.5817616765. The cubic root of 31020241 is about 314.2064209939.

Adding to 31020241 its reverse (14202013), we get a palindrome (45222254).

The spelling of 31020241 in words is "thirty-one million, twenty thousand, two hundred forty-one".