615325261 has 2 divisors, whose sum is σ = 615325262. Its totient is φ = 615325260.

The previous prime is 615325237. The next prime is 615325303. The reversal of 615325261 is 162523516.

615325261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585349636 + 29975625 = 24194^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 615325261 - 2¹⁷ = 615194189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615325211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307662630 + 307662631.

It is an arithmetic number, because the mean of its divisors is an integer number (307662631).

Almost surely, 2^615325261 is an apocalyptic number.

It is an amenable number.

615325261 is a deficient number, since it is larger than the sum of its proper divisors (1).

615325261 is an equidigital number, since it uses as much as digits as its factorization.

615325261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 615325261 is about 24805.7505631255. The cubic root of 615325261 is about 850.5533932678.

Adding to 615325261 its reverse (162523516), we get a palindrome (777848777).

The spelling of 615325261 in words is "six hundred fifteen million, three hundred twenty-five thousand, two hundred sixty-one".