31886149 has 8 divisors (see below), whose sum is σ = 32311800. Its totient is φ = 31463616.

The previous prime is 31886147. The next prime is 31886159. The reversal of 31886149 is 94168813.

It can be written as a sum of positive squares in 4 ways, for example, as 8673025 + 23213124 = 2945^2 + 4818^2 .

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 31886149 - 2¹ = 31886147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31886143) 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, 25159 + ... + 26395.

It is an arithmetic number, because the mean of its divisors is an integer number (4038975).

Almost surely, 2^31886149 is an apocalyptic number.

It is an amenable number.

31886149 is a deficient number, since it is larger than the sum of its proper divisors (425651).

31886149 is a wasteful number, since it uses less digits than its factorization.

31886149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its digits is 41472, while the sum is 40.

The square root of 31886149 is about 5646.7821810302. The cubic root of 31886149 is about 317.1032479877.

The spelling of 31886149 in words is "thirty-one million, eight hundred eighty-six thousand, one hundred forty-nine".