31040144 has 20 divisors (see below), whose sum is σ = 60234240. Its totient is φ = 15495840.

The previous prime is 31040137. The next prime is 31040153. The reversal of 31040144 is 44104013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13649 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (3011712).

Almost surely, 2^31040144 is an apocalyptic number.

It is an amenable number.

31040144 is a deficient number, since it is larger than the sum of its proper divisors (29194096).

31040144 is a wasteful number, since it uses less digits than its factorization.

31040144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038 (or 3032 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31040144 is about 5571.3682341055. The cubic root of 31040144 is about 314.2736063025.

Adding to 31040144 its reverse (44104013), we get a palindrome (75144157).

The spelling of 31040144 in words is "thirty-one million, forty thousand, one hundred forty-four".