31143470 has 24 divisors (see below), whose sum is σ = 59170824. Its totient is φ = 11800368.

The previous prime is 31143467. The next prime is 31143487. The reversal of 31143470 is 7434113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (2465451).

Almost surely, 2^31143470 is an apocalyptic number.

31143470 is a deficient number, since it is larger than the sum of its proper divisors (28027354).

31143470 is a wasteful number, since it uses less digits than its factorization.

31143470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8672 (or 8653 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 31143470 is about 5580.6334765867. The cubic root of 31143470 is about 314.6219366201.

Adding to 31143470 its reverse (7434113), we get a palindrome (38577583).

It can be divided in two parts, 31143 and 470, that added together give a palindrome (31613).

The spelling of 31143470 in words is "thirty-one million, one hundred forty-three thousand, four hundred seventy".