31099206845 has 16 divisors (see below), whose sum is σ = 42654184320. Its totient is φ = 21323248704.

The previous prime is 31099206833. The next prime is 31099206857. The reversal of 31099206845 is 54860299013.

It is an interprime number because it is at equal distance from previous prime (31099206833) and next prime (31099206857).

It is a cyclic number.

It is not a de Polignac number, because 31099206845 - 2¹² = 31099202749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31099206845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432434 + ... + 499196.

It is an arithmetic number, because the mean of its divisors is an integer number (2665886520).

Almost surely, 2^31099206845 is an apocalyptic number.

31099206845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31099206845 is a deficient number, since it is larger than the sum of its proper divisors (11554977475).

31099206845 is a wasteful number, since it uses less digits than its factorization.

31099206845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80084.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 31099206845 in words is "thirty-one billion, ninety-nine million, two hundred six thousand, eight hundred forty-five".