31896131 has 8 divisors (see below), whose sum is σ = 33851520. Its totient is φ = 29949568.

The previous prime is 31896121. The next prime is 31896133. The reversal of 31896131 is 13169813.

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 31896131 - 2¹⁴ = 31879747 is a prime.

It is a super-2 number, since 2×31896131² = 2034726345538322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31896133) 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, 6185 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (4231440).

Almost surely, 2^31896131 is an apocalyptic number.

31896131 is a deficient number, since it is larger than the sum of its proper divisors (1955389).

31896131 is a wasteful number, since it uses less digits than its factorization.

31896131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413.

The product of its digits is 3888, while the sum is 32.

The square root of 31896131 is about 5647.6659780833. The cubic root of 31896131 is about 317.1363343954.

The spelling of 31896131 in words is "thirty-one million, eight hundred ninety-six thousand, one hundred thirty-one".