31431374 has 16 divisors (see below), whose sum is σ = 51061920. Its totient is φ = 14424480.

The previous prime is 31431373. The next prime is 31431383. The reversal of 31431374 is 47313413.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367 + ... + 8045.

It is an arithmetic number, because the mean of its divisors is an integer number (3191370).

Almost surely, 2^31431374 is an apocalyptic number.

31431374 is a deficient number, since it is larger than the sum of its proper divisors (19630546).

31431374 is a wasteful number, since it uses less digits than its factorization.

31431374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875.

The product of its digits is 3024, while the sum is 26.

The square root of 31431374 is about 5606.3690567068. The cubic root of 31431374 is about 315.5884657775.

Adding to 31431374 its reverse (47313413), we get a palindrome (78744787).

The spelling of 31431374 in words is "thirty-one million, four hundred thirty-one thousand, three hundred seventy-four".