615511241 has 2 divisors, whose sum is σ = 615511242. Its totient is φ = 615511240.

The previous prime is 615511219. The next prime is 615511297. The reversal of 615511241 is 142115516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601230400 + 14280841 = 24520^2 + 3779^2 .

It is a cyclic number.

It is not a de Polignac number, because 615511241 - 2¹⁴ = 615494857 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615511241.

It is not a weakly prime, because it can be changed into another prime (615510241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307755620 + 307755621.

It is an arithmetic number, because the mean of its divisors is an integer number (307755621).

Almost surely, 2^615511241 is an apocalyptic number.

It is an amenable number.

615511241 is a deficient number, since it is larger than the sum of its proper divisors (1).

615511241 is an equidigital number, since it uses as much as digits as its factorization.

615511241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 26.

The square root of 615511241 is about 24809.4990074366. The cubic root of 615511241 is about 850.6390769410.

Adding to 615511241 its reverse (142115516), we get a palindrome (757626757).

The spelling of 615511241 in words is "six hundred fifteen million, five hundred eleven thousand, two hundred forty-one".