87222573 has 12 divisors (see below), whose sum is σ = 126129120. Its totient is φ = 58083336.

The previous prime is 87222523. The next prime is 87222589. The reversal of 87222573 is 37522278.

It is a happy number.

87222573 is a `hidden beast` number, since 87 + 2 + 2 + 2 + 573 = 666.

It is not a de Polignac number, because 87222573 - 2¹⁰ = 87221549 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87222503) 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, 3918 + ... + 13776.

It is an arithmetic number, because the mean of its divisors is an integer number (10510760).

Almost surely, 2^87222573 is an apocalyptic number.

It is an amenable number.

87222573 is a deficient number, since it is larger than the sum of its proper divisors (38906547).

87222573 is a wasteful number, since it uses less digits than its factorization.

87222573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10848 (or 10845 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 87222573 is about 9339.3025970894. The cubic root of 87222573 is about 443.4823068923.

The spelling of 87222573 in words is "eighty-seven million, two hundred twenty-two thousand, five hundred seventy-three".