31167161 has 8 divisors (see below), whose sum is σ = 31514184. Its totient is φ = 30822400.

The previous prime is 31167119. The next prime is 31167187. The reversal of 31167161 is 16176113.

It can be written as a sum of positive squares in 4 ways, for example, as 26327161 + 4840000 = 5131^2 + 2200^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31167161 - 2²² = 26972857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31167161.

It is not an unprimeable number, because it can be changed into a prime (31167761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44111 + ... + 44811.

It is an arithmetic number, because the mean of its divisors is an integer number (3939273).

Almost surely, 2^31167161 is an apocalyptic number.

It is an amenable number.

31167161 is a deficient number, since it is larger than the sum of its proper divisors (347023).

31167161 is a wasteful number, since it uses less digits than its factorization.

31167161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its digits is 756, while the sum is 26.

The square root of 31167161 is about 5582.7556815609. The cubic root of 31167161 is about 314.7016945819.

The spelling of 31167161 in words is "thirty-one million, one hundred sixty-seven thousand, one hundred sixty-one".