87775571 has 8 divisors (see below), whose sum is σ = 95667600. Its totient is φ = 80046432.

The previous prime is 87775559. The next prime is 87775603. The reversal of 87775571 is 17557778.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87775571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87775511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39596 + ... + 41753.

It is an arithmetic number, because the mean of its divisors is an integer number (11958450).

Almost surely, 2^87775571 is an apocalyptic number.

87775571 is a deficient number, since it is larger than the sum of its proper divisors (7892029).

87775571 is a wasteful number, since it uses less digits than its factorization.

87775571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81445.

The product of its digits is 480200, while the sum is 47.

The square root of 87775571 is about 9368.8617771851. The cubic root of 87775571 is about 444.4175707339.

The spelling of 87775571 in words is "eighty-seven million, seven hundred seventy-five thousand, five hundred seventy-one".