2181382597 has 2 divisors, whose sum is σ = 2181382598. Its totient is φ = 2181382596.

The previous prime is 2181382589. The next prime is 2181382603. The reversal of 2181382597 is 7952831812.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157509601 + 23872996 = 46449^2 + 4886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181382597 - 2³ = 2181382589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181382507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090691298 + 1090691299.

It is an arithmetic number, because the mean of its divisors is an integer number (1090691299).

Almost surely, 2^2181382597 is an apocalyptic number.

It is an amenable number.

2181382597 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181382597 is an equidigital number, since it uses as much as digits as its factorization.

2181382597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 2181382597 is about 46705.2737600370. The cubic root of 2181382597 is about 1296.9123165007.

The spelling of 2181382597 in words is "two billion, one hundred eighty-one million, three hundred eighty-two thousand, five hundred ninety-seven".