487813581 has 12 divisors (see below), whose sum is σ = 741705120. Its totient is φ = 308092680.

The previous prime is 487813577. The next prime is 487813583. The reversal of 487813581 is 185318784.

It is a happy number.

It is not a de Polignac number, because 487813581 - 2² = 487813577 is a prime.

It is a super-2 number, since 2×487813581² = 475924179616087122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487813583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1426185 + ... + 1426526.

It is an arithmetic number, because the mean of its divisors is an integer number (61808760).

Almost surely, 2^487813581 is an apocalyptic number.

It is an amenable number.

487813581 is a deficient number, since it is larger than the sum of its proper divisors (253891539).

487813581 is a wasteful number, since it uses less digits than its factorization.

487813581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852736 (or 2852733 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 487813581 is about 22086.5022355284. The cubic root of 487813581 is about 787.1991727773.

The spelling of 487813581 in words is "four hundred eighty-seven million, eight hundred thirteen thousand, five hundred eighty-one".