31131046 has 16 divisors (see below), whose sum is σ = 49548240. Its totient is φ = 14618880.

The previous prime is 31131041. The next prime is 31131053. The reversal of 31131046 is 64013113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27010 + ... + 28138.

It is an arithmetic number, because the mean of its divisors is an integer number (3096765).

Almost surely, 2^31131046 is an apocalyptic number.

31131046 is a deficient number, since it is larger than the sum of its proper divisors (18417194).

31131046 is a wasteful number, since it uses less digits than its factorization.

31131046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31131046 is about 5579.5202302707. The cubic root of 31131046 is about 314.5800938962.

Adding to 31131046 its reverse (64013113), we get a palindrome (95144159).

The spelling of 31131046 in words is "thirty-one million, one hundred thirty-one thousand, forty-six".