481817551 has 2 divisors, whose sum is σ = 481817552. Its totient is φ = 481817550.

The previous prime is 481817549. The next prime is 481817641. The reversal of 481817551 is 155718184.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 481817551 - 2¹ = 481817549 is a prime.

Together with 481817549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481817521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240908775 + 240908776.

It is an arithmetic number, because the mean of its divisors is an integer number (240908776).

Almost surely, 2^481817551 is an apocalyptic number.

481817551 is a deficient number, since it is larger than the sum of its proper divisors (1).

481817551 is an equidigital number, since it uses as much as digits as its factorization.

481817551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 40.

The square root of 481817551 is about 21950.3428447029. The cubic root of 481817551 is about 783.9605434251.

The spelling of 481817551 in words is "four hundred eighty-one million, eight hundred seventeen thousand, five hundred fifty-one".