87221594 has 16 divisors (see below), whose sum is σ = 138773736. Its totient is φ = 40972800.

The previous prime is 87221591. The next prime is 87221597. The reversal of 87221594 is 49512278.

It is an interprime number because it is at equal distance from previous prime (87221591) and next prime (87221597).

It can be written as a sum of positive squares in 4 ways, for example, as 87179569 + 42025 = 9337^2 + 205^2 .

It is not an unprimeable number, because it can be changed into a prime (87221591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20534 + ... + 24414.

Almost surely, 2^87221594 is an apocalyptic number.

87221594 is a deficient number, since it is larger than the sum of its proper divisors (51552142).

87221594 is a wasteful number, since it uses less digits than its factorization.

87221594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4561.

The product of its digits is 40320, while the sum is 38.

The square root of 87221594 is about 9339.2501840351. The cubic root of 87221594 is about 443.4806476475.

The spelling of 87221594 in words is "eighty-seven million, two hundred twenty-one thousand, five hundred ninety-four".