65572261 has 2 divisors, whose sum is σ = 65572262. Its totient is φ = 65572260.

The previous prime is 65572253. The next prime is 65572303. The reversal of 65572261 is 16227556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 1476225 = 8006^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 65572261 - 2³ = 65572253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65572231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32786130 + 32786131.

It is an arithmetic number, because the mean of its divisors is an integer number (32786131).

Almost surely, 2^65572261 is an apocalyptic number.

It is an amenable number.

65572261 is a deficient number, since it is larger than the sum of its proper divisors (1).

65572261 is an equidigital number, since it uses as much as digits as its factorization.

65572261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 65572261 is about 8097.6700970094. The cubic root of 65572261 is about 403.2490809758.

The spelling of 65572261 in words is "sixty-five million, five hundred seventy-two thousand, two hundred sixty-one".