2131156187 has 2 divisors, whose sum is σ = 2131156188. Its totient is φ = 2131156186.

The previous prime is 2131156171. The next prime is 2131156199. The reversal of 2131156187 is 7816511312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131156187 - 2⁴ = 2131156171 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131156117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065578093 + 1065578094.

It is an arithmetic number, because the mean of its divisors is an integer number (1065578094).

Almost surely, 2^2131156187 is an apocalyptic number.

2131156187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131156187 is an equidigital number, since it uses as much as digits as its factorization.

2131156187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 2131156187 is about 46164.4472186119. The cubic root of 2131156187 is about 1286.8811113201.

Adding to 2131156187 its reverse (7816511312), we get a palindrome (9947667499).

The spelling of 2131156187 in words is "two billion, one hundred thirty-one million, one hundred fifty-six thousand, one hundred eighty-seven".