31109099 has 16 divisors (see below), whose sum is σ = 39628800. Its totient is φ = 23773824.

The previous prime is 31109077. The next prime is 31109101. The reversal of 31109099 is 99090113.

It is a cyclic number.

It is not a de Polignac number, because 31109099 - 2²⁰ = 30060523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31109009) 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, 4619 + ... + 9140.

It is an arithmetic number, because the mean of its divisors is an integer number (2476800).

Almost surely, 2^31109099 is an apocalyptic number.

31109099 is a deficient number, since it is larger than the sum of its proper divisors (8519701).

31109099 is a wasteful number, since it uses less digits than its factorization.

31109099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 31109099 is about 5577.5531373533. The cubic root of 31109099 is about 314.5061515003.

The spelling of 31109099 in words is "thirty-one million, one hundred nine thousand, ninety-nine".