498561831 has 16 divisors (see below), whose sum is σ = 752548320. Its totient is φ = 326102400.

The previous prime is 498561797. The next prime is 498561851. The reversal of 498561831 is 138165894.

498561831 is a `hidden beast` number, since 4 + 9 + 8 + 561 + 83 + 1 = 666.

It is not a de Polignac number, because 498561831 - 2⁹ = 498561319 is a prime.

It is a super-2 number, since 2×498561831² = 497127798660145122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498561851) 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 in 15 ways as a sum of consecutive naturals, for example, 172770 + ... + 175631.

It is an arithmetic number, because the mean of its divisors is an integer number (47034270).

Almost surely, 2^498561831 is an apocalyptic number.

498561831 is a deficient number, since it is larger than the sum of its proper divisors (253986489).

498561831 is a wasteful number, since it uses less digits than its factorization.

498561831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348463 (or 348457 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 498561831 is about 22328.4981805763. The cubic root of 498561831 is about 792.9388115394.

The spelling of 498561831 in words is "four hundred ninety-eight million, five hundred sixty-one thousand, eight hundred thirty-one".