64033261 has 2 divisors, whose sum is σ = 64033262. Its totient is φ = 64033260.

The previous prime is 64033243. The next prime is 64033297. The reversal of 64033261 is 16233046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49970761 + 14062500 = 7069^2 + 3750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64033261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64033241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32016630 + 32016631.

It is an arithmetic number, because the mean of its divisors is an integer number (32016631).

Almost surely, 2^64033261 is an apocalyptic number.

It is an amenable number.

64033261 is a deficient number, since it is larger than the sum of its proper divisors (1).

64033261 is an equidigital number, since it uses as much as digits as its factorization.

64033261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 64033261 is about 8002.0785424788. The cubic root of 64033261 is about 400.0692817494.

The spelling of 64033261 in words is "sixty-four million, thirty-three thousand, two hundred sixty-one".