31340085 has 16 divisors (see below), whose sum is σ = 57307776. Its totient is φ = 14326848.

The previous prime is 31340081. The next prime is 31340087. The reversal of 31340085 is 58004313.

It is not a de Polignac number, because 31340085 - 2² = 31340081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340081) 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, 149134 + ... + 149343.

It is an arithmetic number, because the mean of its divisors is an integer number (3581736).

Almost surely, 2^31340085 is an apocalyptic number.

31340085 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31340085 is a deficient number, since it is larger than the sum of its proper divisors (25967691).

31340085 is a wasteful number, since it uses less digits than its factorization.

31340085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298492.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 31340085 is about 5598.2215926131. The cubic root of 31340085 is about 315.2826387383.

Adding to 31340085 its reverse (58004313), we get a palindrome (89344398).

The spelling of 31340085 in words is "thirty-one million, three hundred forty thousand, eighty-five".