61615241 has 2 divisors, whose sum is σ = 61615242. Its totient is φ = 61615240.

The previous prime is 61615223. The next prime is 61615297. The reversal of 61615241 is 14251616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 14280841 = 6880^2 + 3779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61615241 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 61615241.

It is not a weakly prime, because it can be changed into another prime (61611241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30807620 + 30807621.

It is an arithmetic number, because the mean of its divisors is an integer number (30807621).

Almost surely, 2^61615241 is an apocalyptic number.

It is an amenable number.

61615241 is a deficient number, since it is larger than the sum of its proper divisors (1).

61615241 is an equidigital number, since it uses as much as digits as its factorization.

61615241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 61615241 is about 7849.5376296951. The cubic root of 61615241 is about 394.9687333046.

Adding to 61615241 its reverse (14251616), we get a palindrome (75866857).

The spelling of 61615241 in words is "sixty-one million, six hundred fifteen thousand, two hundred forty-one".