31471424 has 28 divisors (see below), whose sum is σ = 62674500. Its totient is φ = 15679488.

The previous prime is 31471411. The next prime is 31471439. The reversal of 31471424 is 42417413.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 22278400 = 3032^2 + 4720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31471393 and 31471402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21632 + ... + 23040.

It is an arithmetic number, because the mean of its divisors is an integer number (2238375).

Almost surely, 2^31471424 is an apocalyptic number.

It is an amenable number.

31471424 is a deficient number, since it is larger than the sum of its proper divisors (31203076).

31471424 is a wasteful number, since it uses less digits than its factorization.

31471424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1760 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 31471424 is about 5609.9397501221. The cubic root of 31471424 is about 315.7224503061.

Adding to 31471424 its reverse (42417413), we get a palindrome (73888837).

The spelling of 31471424 in words is "thirty-one million, four hundred seventy-one thousand, four hundred twenty-four".