2135795621 has 2 divisors, whose sum is σ = 2135795622. Its totient is φ = 2135795620.

The previous prime is 2135795603. The next prime is 2135795653. The reversal of 2135795621 is 1265975312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1946044996 + 189750625 = 44114^2 + 13775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2135795621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135795671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067897810 + 1067897811.

It is an arithmetic number, because the mean of its divisors is an integer number (1067897811).

Almost surely, 2^2135795621 is an apocalyptic number.

It is an amenable number.

2135795621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135795621 is an equidigital number, since it uses as much as digits as its factorization.

2135795621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 2135795621 is about 46214.6688941942. The cubic root of 2135795621 is about 1287.8142625077.

The spelling of 2135795621 in words is "two billion, one hundred thirty-five million, seven hundred ninety-five thousand, six hundred twenty-one".