87222905 has 16 divisors (see below), whose sum is σ = 130495104. Its totient is φ = 54372480.

The previous prime is 87222899. The next prime is 87222907. The reversal of 87222905 is 50922278.

It is not a de Polignac number, because 87222905 - 2⁶ = 87222841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87222907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112892 + ... + 113661.

It is an arithmetic number, because the mean of its divisors is an integer number (8155944).

Almost surely, 2^87222905 is an apocalyptic number.

It is an amenable number.

87222905 is a deficient number, since it is larger than the sum of its proper divisors (43272199).

87222905 is a wasteful number, since it uses less digits than its factorization.

87222905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226576.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 87222905 is about 9339.3203714189. The cubic root of 87222905 is about 443.4828695751.

The spelling of 87222905 in words is "eighty-seven million, two hundred twenty-two thousand, nine hundred five".