31431066 has 16 divisors (see below), whose sum is σ = 62935488. Its totient is φ = 10464800.

The previous prime is 31431031. The next prime is 31431121. The reversal of 31431066 is 66013413.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 3646 + ... + 8726.

It is an arithmetic number, because the mean of its divisors is an integer number (3933468).

Almost surely, 2^31431066 is an apocalyptic number.

31431066 is an abundant number, since it is smaller than the sum of its proper divisors (31504422).

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

31431066 is a wasteful number, since it uses less digits than its factorization.

31431066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31431066 is about 5606.3415878806. The cubic root of 31431066 is about 315.5874349437.

Adding to 31431066 its reverse (66013413), we get a palindrome (97444479).

The spelling of 31431066 in words is "thirty-one million, four hundred thirty-one thousand, sixty-six".