521363461 has 2 divisors, whose sum is σ = 521363462. Its totient is φ = 521363460.

The previous prime is 521363431. The next prime is 521363473. The reversal of 521363461 is 164363125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521254561 + 108900 = 22831^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 521363461 - 2¹⁷ = 521232389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521363431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260681730 + 260681731.

It is an arithmetic number, because the mean of its divisors is an integer number (260681731).

Almost surely, 2^521363461 is an apocalyptic number.

It is an amenable number.

521363461 is a deficient number, since it is larger than the sum of its proper divisors (1).

521363461 is an equidigital number, since it uses as much as digits as its factorization.

521363461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 521363461 is about 22833.3847906963. The cubic root of 521363461 is about 804.8473720126.

The spelling of 521363461 in words is "five hundred twenty-one million, three hundred sixty-three thousand, four hundred sixty-one".