490221551 has 2 divisors, whose sum is σ = 490221552. Its totient is φ = 490221550.

The previous prime is 490221521. The next prime is 490221583. The reversal of 490221551 is 155122094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490221551 - 2¹⁰ = 490220527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490221521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245110775 + 245110776.

It is an arithmetic number, because the mean of its divisors is an integer number (245110776).

Almost surely, 2^490221551 is an apocalyptic number.

490221551 is a deficient number, since it is larger than the sum of its proper divisors (1).

490221551 is an equidigital number, since it uses as much as digits as its factorization.

490221551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 490221551 is about 22140.9473826212. The cubic root of 490221551 is about 788.4923180948.

The spelling of 490221551 in words is "four hundred ninety million, two hundred twenty-one thousand, five hundred fifty-one".