61217441 has 2 divisors, whose sum is σ = 61217442. Its totient is φ = 61217440.

The previous prime is 61217419. The next prime is 61217447. The reversal of 61217441 is 14471216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 7268416 = 7345^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 61217441 - 2¹⁰ = 61216417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61217441.

It is not a weakly prime, because it can be changed into another prime (61217447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608720 + 30608721.

It is an arithmetic number, because the mean of its divisors is an integer number (30608721).

Almost surely, 2^61217441 is an apocalyptic number.

It is an amenable number.

61217441 is a deficient number, since it is larger than the sum of its proper divisors (1).

61217441 is an equidigital number, since it uses as much as digits as its factorization.

61217441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 61217441 is about 7824.1575265328. The cubic root of 61217441 is about 394.1168990997.

Adding to 61217441 its reverse (14471216), we get a palindrome (75688657).

The spelling of 61217441 in words is "sixty-one million, two hundred seventeen thousand, four hundred forty-one".