87722265 has 16 divisors (see below), whose sum is σ = 140761728. Its totient is φ = 46649856.

The previous prime is 87722263. The next prime is 87722269. The reversal of 87722265 is 56222778.

It is not a de Polignac number, because 87722265 - 2¹ = 87722263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87722263) 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, 2989 + ... + 13578.

It is an arithmetic number, because the mean of its divisors is an integer number (8797608).

Almost surely, 2^87722265 is an apocalyptic number.

It is an amenable number.

87722265 is a deficient number, since it is larger than the sum of its proper divisors (53039463).

87722265 is a wasteful number, since it uses less digits than its factorization.

87722265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16928.

The product of its digits is 94080, while the sum is 39.

The square root of 87722265 is about 9366.0164958215. The cubic root of 87722265 is about 444.3275877616.

The spelling of 87722265 in words is "eighty-seven million, seven hundred twenty-two thousand, two hundred sixty-five".