2136529981 has 2 divisors, whose sum is σ = 2136529982. Its totient is φ = 2136529980.

The previous prime is 2136529943. The next prime is 2136530027. The reversal of 2136529981 is 1899256312.

It is an a-pointer prime, because the next prime (2136530027) can be obtained adding 2136529981 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1836893881 + 299636100 = 42859^2 + 17310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136529981 - 2²¹ = 2134432829 is a prime.

It is a super-2 number, since 2×2136529981² = 9129520719423720722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2136529921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068264990 + 1068264991.

It is an arithmetic number, because the mean of its divisors is an integer number (1068264991).

Almost surely, 2^2136529981 is an apocalyptic number.

It is an amenable number.

2136529981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136529981 is an equidigital number, since it uses as much as digits as its factorization.

2136529981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 2136529981 is about 46222.6133077739. The cubic root of 2136529981 is about 1287.9618438747.

The spelling of 2136529981 in words is "two billion, one hundred thirty-six million, five hundred twenty-nine thousand, nine hundred eighty-one".