87571009242 has 12 divisors (see below), whose sum is σ = 189737186730. Its totient is φ = 29190336408.

The previous prime is 87571009237. The next prime is 87571009247. The reversal of 87571009242 is 24290017578.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87571009237) and next prime (87571009247).

It can be written as a sum of positive squares in only one way, i.e., 58100763681 + 29470245561 = 241041^2 + 171669^2 .

It is not an unprimeable number, because it can be changed into a prime (87571009247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2432528017 + ... + 2432528052.

Almost surely, 2^87571009242 is an apocalyptic number.

87571009242 is an abundant number, since it is smaller than the sum of its proper divisors (102166177488).

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

87571009242 is a wasteful number, since it uses less digits than its factorization.

87571009242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865056077 (or 4865056074 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 87571009242 in words is "eighty-seven billion, five hundred seventy-one million, nine thousand, two hundred forty-two".