65241557 has 2 divisors, whose sum is σ = 65241558. Its totient is φ = 65241556.

The previous prime is 65241541. The next prime is 65241571. The reversal of 65241557 is 75514256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50140561 + 15100996 = 7081^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 65241557 - 2⁴ = 65241541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65246557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32620778 + 32620779.

It is an arithmetic number, because the mean of its divisors is an integer number (32620779).

Almost surely, 2^65241557 is an apocalyptic number.

It is an amenable number.

65241557 is a deficient number, since it is larger than the sum of its proper divisors (1).

65241557 is an equidigital number, since it uses as much as digits as its factorization.

65241557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 35.

The square root of 65241557 is about 8077.2245852149. The cubic root of 65241557 is about 402.5700290945.

The spelling of 65241557 in words is "sixty-five million, two hundred forty-one thousand, five hundred fifty-seven".