521453249 has 2 divisors, whose sum is σ = 521453250. Its totient is φ = 521453248.

The previous prime is 521453221. The next prime is 521453267. The reversal of 521453249 is 942354125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493150849 + 28302400 = 22207^2 + 5320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521453249 is a prime.

It is not a weakly prime, because it can be changed into another prime (521453549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260726624 + 260726625.

It is an arithmetic number, because the mean of its divisors is an integer number (260726625).

Almost surely, 2^521453249 is an apocalyptic number.

It is an amenable number.

521453249 is a deficient number, since it is larger than the sum of its proper divisors (1).

521453249 is an equidigital number, since it uses as much as digits as its factorization.

521453249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 521453249 is about 22835.3508622049. The cubic root of 521453249 is about 804.8935723400.

The spelling of 521453249 in words is "five hundred twenty-one million, four hundred fifty-three thousand, two hundred forty-nine".