2156312087 has 2 divisors, whose sum is σ = 2156312088. Its totient is φ = 2156312086.

The previous prime is 2156312063. The next prime is 2156312129. The reversal of 2156312087 is 7802136512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156312087 - 2¹⁰ = 2156311063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156312017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078156043 + 1078156044.

It is an arithmetic number, because the mean of its divisors is an integer number (1078156044).

Almost surely, 2^2156312087 is an apocalyptic number.

2156312087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156312087 is an equidigital number, since it uses as much as digits as its factorization.

2156312087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2156312087 is about 46436.1075780475. The cubic root of 2156312087 is about 1291.9247127338.

Adding to 2156312087 its reverse (7802136512), we get a palindrome (9958448599).

The spelling of 2156312087 in words is "two billion, one hundred fifty-six million, three hundred twelve thousand, eighty-seven".