31051161 has 16 divisors (see below), whose sum is σ = 46982400. Its totient is φ = 20259504.

The previous prime is 31051151. The next prime is 31051193. The reversal of 31051161 is 16115013.

It is not a de Polignac number, because 31051161 - 2¹⁰ = 31050137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31051151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10966 + ... + 13503.

It is an arithmetic number, because the mean of its divisors is an integer number (2936400).

Almost surely, 2^31051161 is an apocalyptic number.

It is an amenable number.

31051161 is a deficient number, since it is larger than the sum of its proper divisors (15931239).

31051161 is a wasteful number, since it uses less digits than its factorization.

31051161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24525 (or 24519 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 31051161 is about 5572.3568622263. The cubic root of 31051161 is about 314.3107833506.

Adding to 31051161 its reverse (16115013), we get a palindrome (47166174).

The spelling of 31051161 in words is "thirty-one million, fifty-one thousand, one hundred sixty-one".