31471146 has 32 divisors (see below), whose sum is σ = 79927680. Its totient is φ = 8991648.

The previous prime is 31471123. The next prime is 31471147. The reversal of 31471146 is 64117413.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (31471147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41251 + ... + 42006.

It is an arithmetic number, because the mean of its divisors is an integer number (2497740).

Almost surely, 2^31471146 is an apocalyptic number.

31471146 is an abundant number, since it is smaller than the sum of its proper divisors (48456534).

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

31471146 is a wasteful number, since it uses less digits than its factorization.

31471146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83275 (or 83269 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 31471146 is about 5609.9149726177. The cubic root of 31471146 is about 315.7215206681.

Adding to 31471146 its reverse (64117413), we get a palindrome (95588559).

The spelling of 31471146 in words is "thirty-one million, four hundred seventy-one thousand, one hundred forty-six".