521341651 has 2 divisors, whose sum is σ = 521341652. Its totient is φ = 521341650.

The previous prime is 521341649. The next prime is 521341693. The reversal of 521341651 is 156143125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521341651 - 2¹ = 521341649 is a prime.

Together with 521341649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (521341631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260670825 + 260670826.

It is an arithmetic number, because the mean of its divisors is an integer number (260670826).

Almost surely, 2^521341651 is an apocalyptic number.

521341651 is a deficient number, since it is larger than the sum of its proper divisors (1).

521341651 is an equidigital number, since it uses as much as digits as its factorization.

521341651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 521341651 is about 22832.9071955369. The cubic root of 521341651 is about 804.8361488978.

Adding to 521341651 its reverse (156143125), we get a palindrome (677484776).

It can be divided in two parts, 5213 and 41651, that added together give a palindrome (46864).

The spelling of 521341651 in words is "five hundred twenty-one million, three hundred forty-one thousand, six hundred fifty-one".