87722181243 has 12 divisors (see below), whose sum is σ = 126769361160. Its totient is φ = 58453972416.

The previous prime is 87722181241. The next prime is 87722181251. The reversal of 87722181243 is 34218122778.

It is not a de Polignac number, because 87722181243 - 2¹ = 87722181241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87722181241) 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, 2269921 + ... + 2308242.

It is an arithmetic number, because the mean of its divisors is an integer number (10564113430).

Almost surely, 2^87722181243 is an apocalyptic number.

87722181243 is a deficient number, since it is larger than the sum of its proper divisors (39047179917).

87722181243 is a wasteful number, since it uses less digits than its factorization.

87722181243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580298 (or 4580295 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The spelling of 87722181243 in words is "eighty-seven billion, seven hundred twenty-two million, one hundred eighty-one thousand, two hundred forty-three".