490816251 has 18 divisors (see below), whose sum is σ = 741128388. Its totient is φ = 312981240.

The previous prime is 490816247. The next prime is 490816283. The reversal of 490816251 is 152618094.

490816251 is a `hidden beast` number, since 490 + 8 + 162 + 5 + 1 = 666.

It is not a de Polignac number, because 490816251 - 2² = 490816247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (490816201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46785 + ... + 56306.

Almost surely, 2^490816251 is an apocalyptic number.

490816251 is a deficient number, since it is larger than the sum of its proper divisors (250312137).

490816251 is a wasteful number, since it uses less digits than its factorization.

490816251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103143 (or 103117 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 490816251 is about 22154.3731800293. The cubic root of 490816251 is about 788.8110358190.

The spelling of 490816251 in words is "four hundred ninety million, eight hundred sixteen thousand, two hundred fifty-one".