2931157538887 has 2 divisors, whose sum is σ = 2931157538888. Its totient is φ = 2931157538886.

The previous prime is 2931157538801. The next prime is 2931157538891. The reversal of 2931157538887 is 7888357511392.

2931157538887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2931157538887 - 2¹⁵ = 2931157506119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2931157530887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1465578769443 + 1465578769444.

It is an arithmetic number, because the mean of its divisors is an integer number (1465578769444).

Almost surely, 2^{2931157538887} is an apocalyptic number.

2931157538887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2931157538887 is an equidigital number, since it uses as much as digits as its factorization.

2931157538887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101606400, while the sum is 67.

The spelling of 2931157538887 in words is "two trillion, nine hundred thirty-one billion, one hundred fifty-seven million, five hundred thirty-eight thousand, eight hundred eighty-seven".