31471144 has 32 divisors (see below), whose sum is σ = 62488800. Its totient is φ = 14817600.

The previous prime is 31471123. The next prime is 31471147. The reversal of 31471144 is 44117413.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31471147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29419 + ... + 30469.

It is an arithmetic number, because the mean of its divisors is an integer number (1952775).

Almost surely, 2^31471144 is an apocalyptic number.

It is an amenable number.

31471144 is a deficient number, since it is larger than the sum of its proper divisors (31017656).

31471144 is a wasteful number, since it uses less digits than its factorization.

31471144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1269 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 31471144 is about 5609.9147943619. The cubic root of 31471144 is about 315.7215139800.

Adding to 31471144 its reverse (44117413), we get a palindrome (75588557).

The spelling of 31471144 in words is "thirty-one million, four hundred seventy-one thousand, one hundred forty-four".