31161046 has 16 divisors (see below), whose sum is σ = 53762976. Its totient is φ = 13268736.

The previous prime is 31161043. The next prime is 31161089. The reversal of 31161046 is 64016113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31161041) 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, 4891 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (3360186).

Almost surely, 2^31161046 is an apocalyptic number.

31161046 is a deficient number, since it is larger than the sum of its proper divisors (22601930).

31161046 is a wasteful number, since it uses less digits than its factorization.

31161046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14343.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31161046 is about 5582.2079860930. The cubic root of 31161046 is about 314.6811117347.

Adding to 31161046 its reverse (64016113), we get a palindrome (95177159).

The spelling of 31161046 in words is "thirty-one million, one hundred sixty-one thousand, forty-six".