2156115487 has 2 divisors, whose sum is σ = 2156115488. Its totient is φ = 2156115486.

The previous prime is 2156115469. The next prime is 2156115499. The reversal of 2156115487 is 7845116512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156115487 - 2⁷ = 2156115359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156115407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078057743 + 1078057744.

It is an arithmetic number, because the mean of its divisors is an integer number (1078057744).

Almost surely, 2^2156115487 is an apocalyptic number.

2156115487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156115487 is an equidigital number, since it uses as much as digits as its factorization.

2156115487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 40.

The square root of 2156115487 is about 46433.9906426316. The cubic root of 2156115487 is about 1291.8854481456.

The spelling of 2156115487 in words is "two billion, one hundred fifty-six million, one hundred fifteen thousand, four hundred eighty-seven".