505455451 has 2 divisors, whose sum is σ = 505455452. Its totient is φ = 505455450.

The previous prime is 505455449. The next prime is 505455479. The reversal of 505455451 is 154554505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505455451 - 2¹ = 505455449 is a prime.

It is a super-2 number, since 2×505455451² = 510970425891226802, which contains 22 as substring.

Together with 505455449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505455491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252727725 + 252727726.

It is an arithmetic number, because the mean of its divisors is an integer number (252727726).

Almost surely, 2^505455451 is an apocalyptic number.

505455451 is a deficient number, since it is larger than the sum of its proper divisors (1).

505455451 is an equidigital number, since it uses as much as digits as its factorization.

505455451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 505455451 is about 22482.3364221782. The cubic root of 505455451 is about 796.5767533507.

The spelling of 505455451 in words is "five hundred five million, four hundred fifty-five thousand, four hundred fifty-one".