23103131212309 has 4 divisors (see below), whose sum is σ = 23103161111404. Its totient is φ = 23103101313216.

The previous prime is 23103131212297. The next prime is 23103131212321. The reversal of 23103131212309 is 90321213130132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23103131212297) and next prime (23103131212321).

It can be written as a sum of positive squares in 2 ways, for example, as 22493943157284 + 609188055025 = 4742778^2 + 780505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23103131212309 is a prime.

It is a super-2 number, since 2×23103131212309² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103131212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13758882 + ... + 15346435.

It is an arithmetic number, because the mean of its divisors is an integer number (5775790277851).

Almost surely, 2^{23103131212309} is an apocalyptic number.

It is an amenable number.

23103131212309 is a deficient number, since it is larger than the sum of its proper divisors (29899095).

23103131212309 is an equidigital number, since it uses as much as digits as its factorization.

23103131212309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29899094.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 23103131212309 in words is "twenty-three trillion, one hundred three billion, one hundred thirty-one million, two hundred twelve thousand, three hundred nine".