2135425261 has 2 divisors, whose sum is σ = 2135425262. Its totient is φ = 2135425260.

The previous prime is 2135425247. The next prime is 2135425319. The reversal of 2135425261 is 1625245312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1875409636 + 260015625 = 43306^2 + 16125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2135425261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135425241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067712630 + 1067712631.

It is an arithmetic number, because the mean of its divisors is an integer number (1067712631).

Almost surely, 2^2135425261 is an apocalyptic number.

It is an amenable number.

2135425261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135425261 is an equidigital number, since it uses as much as digits as its factorization.

2135425261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 2135425261 is about 46210.6617676051. The cubic root of 2135425261 is about 1287.7398199194.

The spelling of 2135425261 in words is "two billion, one hundred thirty-five million, four hundred twenty-five thousand, two hundred sixty-one".