31143474 has 16 divisors (see below), whose sum is σ = 69207840. Its totient is φ = 10381140.

The previous prime is 31143467. The next prime is 31143487. The reversal of 31143474 is 47434113.

31143474 is a `hidden beast` number, since 311 + 4 + 347 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288312 + ... + 288419.

It is an arithmetic number, because the mean of its divisors is an integer number (4325490).

Almost surely, 2^31143474 is an apocalyptic number.

31143474 is an abundant number, since it is smaller than the sum of its proper divisors (38064366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31143474 is a wasteful number, since it uses less digits than its factorization.

31143474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576742 (or 576736 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 31143474 is about 5580.6338349689. The cubic root of 31143474 is about 314.6219500898.

Adding to 31143474 its reverse (47434113), we get a palindrome (78577587).

The spelling of 31143474 in words is "thirty-one million, one hundred forty-three thousand, four hundred seventy-four".