31320000123287 has 2 divisors, whose sum is σ = 31320000123288. Its totient is φ = 31320000123286.

The previous prime is 31320000123283. The next prime is 31320000123301. The reversal of 31320000123287 is 78232100002313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31320000123287 - 2² = 31320000123283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320000123281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660000061643 + 15660000061644.

It is an arithmetic number, because the mean of its divisors is an integer number (15660000061644).

Almost surely, 2^{31320000123287} is an apocalyptic number.

31320000123287 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320000123287 is an equidigital number, since it uses as much as digits as its factorization.

31320000123287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 31320000123287 in words is "thirty-one trillion, three hundred twenty billion, one hundred twenty-three thousand, two hundred eighty-seven".