31215512340151 has 2 divisors, whose sum is σ = 31215512340152. Its totient is φ = 31215512340150.

The previous prime is 31215512340149. The next prime is 31215512340203. The reversal of 31215512340151 is 15104321551213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31215512340151 - 2¹ = 31215512340149 is a prime.

Together with 31215512340149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31215512340121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15607756170075 + 15607756170076.

It is an arithmetic number, because the mean of its divisors is an integer number (15607756170076).

Almost surely, 2^{31215512340151} is an apocalyptic number.

31215512340151 is a deficient number, since it is larger than the sum of its proper divisors (1).

31215512340151 is an equidigital number, since it uses as much as digits as its factorization.

31215512340151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 31215512340151 its reverse (15104321551213), we get a palindrome (46319833891364).

The spelling of 31215512340151 in words is "thirty-one trillion, two hundred fifteen billion, five hundred twelve million, three hundred forty thousand, one hundred fifty-one".