87222427 has 4 divisors (see below), whose sum is σ = 92353176. Its totient is φ = 82091680.

The previous prime is 87222419. The next prime is 87222439. The reversal of 87222427 is 72422278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87222427 - 2³ = 87222419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87222392 and 87222401.

It is not an unprimeable number, because it can be changed into a prime (87222467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2565349 + ... + 2565382.

It is an arithmetic number, because the mean of its divisors is an integer number (23088294).

Almost surely, 2^87222427 is an apocalyptic number.

87222427 is a deficient number, since it is larger than the sum of its proper divisors (5130749).

87222427 is a wasteful number, since it uses less digits than its factorization.

87222427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130748.

The product of its digits is 25088, while the sum is 34.

The square root of 87222427 is about 9339.2947806566. The cubic root of 87222427 is about 443.4820594470.

The spelling of 87222427 in words is "eighty-seven million, two hundred twenty-two thousand, four hundred twenty-seven".