491571258 has 8 divisors (see below), whose sum is σ = 983142528. Its totient is φ = 163857084.

The previous prime is 491571253. The next prime is 491571277. The reversal of 491571258 is 852175194.

It is a sphenic number, since it is the product of 3 distinct primes.

491571258 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (491571251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40964266 + ... + 40964277.

It is an arithmetic number, because the mean of its divisors is an integer number (122892816).

Almost surely, 2^491571258 is an apocalyptic number.

491571258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491571258 is a wasteful number, since it uses less digits than its factorization.

491571258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81928548.

The product of its digits is 100800, while the sum is 42.

The square root of 491571258 is about 22171.4063153423. The cubic root of 491571258 is about 789.2152962303.

The spelling of 491571258 in words is "four hundred ninety-one million, five hundred seventy-one thousand, two hundred fifty-eight".