521052451 has 2 divisors, whose sum is σ = 521052452. Its totient is φ = 521052450.

The previous prime is 521052449. The next prime is 521052461. The reversal of 521052451 is 154250125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521052451 - 2¹ = 521052449 is a prime.

Together with 521052449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (521052421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260526225 + 260526226.

It is an arithmetic number, because the mean of its divisors is an integer number (260526226).

Almost surely, 2^521052451 is an apocalyptic number.

521052451 is a deficient number, since it is larger than the sum of its proper divisors (1).

521052451 is an equidigital number, since it uses as much as digits as its factorization.

521052451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 521052451 is about 22826.5733521262. The cubic root of 521052451 is about 804.6873011023.

The spelling of 521052451 in words is "five hundred twenty-one million, fifty-two thousand, four hundred fifty-one".