31440020241 has 32 divisors (see below), whose sum is σ = 50400691200. Its totient is φ = 17052194880.

The previous prime is 31440020239. The next prime is 31440020267. The reversal of 31440020241 is 14202004413.

It is not a de Polignac number, because 31440020241 - 2¹ = 31440020239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31440020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401575 + ... + 473436.

It is an arithmetic number, because the mean of its divisors is an integer number (1575021600).

Almost surely, 2^31440020241 is an apocalyptic number.

It is an amenable number.

31440020241 is a deficient number, since it is larger than the sum of its proper divisors (18960670959).

31440020241 is a wasteful number, since it uses less digits than its factorization.

31440020241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875109.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31440020241 its reverse (14202004413), we get a palindrome (45642024654).

The spelling of 31440020241 in words is "thirty-one billion, four hundred forty million, twenty thousand, two hundred forty-one".