31087101 has 16 divisors (see below), whose sum is σ = 45403200. Its totient is φ = 18832128.

The previous prime is 31087087. The next prime is 31087117. The reversal of 31087101 is 10178013.

It is not a de Polignac number, because 31087101 - 2⁹ = 31086589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31087181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9031 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (2837700).

Almost surely, 2^31087101 is an apocalyptic number.

It is an amenable number.

31087101 is a deficient number, since it is larger than the sum of its proper divisors (14316099).

31087101 is a wasteful number, since it uses less digits than its factorization.

31087101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21068.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 31087101 is about 5575.5807769236. The cubic root of 31087101 is about 314.4320023721.

The spelling of 31087101 in words is "thirty-one million, eighty-seven thousand, one hundred one".