87115545 has 24 divisors (see below), whose sum is σ = 164728512. Its totient is φ = 42237600.

The previous prime is 87115543. The next prime is 87115571. The reversal of 87115545 is 54551178.

It is not a de Polignac number, because 87115545 - 2¹ = 87115543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87115543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87501 + ... + 88490.

It is an arithmetic number, because the mean of its divisors is an integer number (6863688).

Almost surely, 2^87115545 is an apocalyptic number.

It is an amenable number.

87115545 is a deficient number, since it is larger than the sum of its proper divisors (77612967).

87115545 is a wasteful number, since it uses less digits than its factorization.

87115545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176013 (or 176010 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 87115545 is about 9333.5708600728. The cubic root of 87115545 is about 443.3008383793.

The spelling of 87115545 in words is "eighty-seven million, one hundred fifteen thousand, five hundred forty-five".