31406085 has 12 divisors (see below), whose sum is σ = 54437292. Its totient is φ = 16749888.

The previous prime is 31406083. The next prime is 31406099. The reversal of 31406085 is 58060413.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 22638564 = 2961^2 + 4758^2 .

It is not a de Polignac number, because 31406085 - 2¹ = 31406083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31406083) 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 11 ways as a sum of consecutive naturals, for example, 348912 + ... + 349001.

It is an arithmetic number, because the mean of its divisors is an integer number (4536441).

Almost surely, 2^31406085 is an apocalyptic number.

It is an amenable number.

31406085 is a deficient number, since it is larger than the sum of its proper divisors (23031207).

31406085 is a wasteful number, since it uses less digits than its factorization.

31406085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697924 (or 697921 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 31406085 is about 5604.1132215543. The cubic root of 31406085 is about 315.5038045290.

Adding to 31406085 its reverse (58060413), we get a palindrome (89466498).

The spelling of 31406085 in words is "thirty-one million, four hundred six thousand, eighty-five".