491582550 has 24 divisors (see below), whose sum is σ = 1219125096. Its totient is φ = 131088640.

The previous prime is 491582549. The next prime is 491582587. The reversal of 491582550 is 55285194.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 491582499 and 491582508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1638459 + ... + 1638758.

It is an arithmetic number, because the mean of its divisors is an integer number (50796879).

Almost surely, 2^491582550 is an apocalyptic number.

491582550 is an abundant number, since it is smaller than the sum of its proper divisors (727542546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491582550 is a wasteful number, since it uses less digits than its factorization.

491582550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277232 (or 3277227 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 491582550 is about 22171.6609661974. The cubic root of 491582550 is about 789.2213392680.

The spelling of 491582550 in words is "four hundred ninety-one million, five hundred eighty-two thousand, five hundred fifty".