87040221 has 16 divisors (see below), whose sum is σ = 123099264. Its totient is φ = 54516224.

The previous prime is 87040201. The next prime is 87040231. The reversal of 87040221 is 12204078.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87040221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87040191 and 87040200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87040201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36745 + ... + 39041.

It is an arithmetic number, because the mean of its divisors is an integer number (7693704).

Almost surely, 2^87040221 is an apocalyptic number.

It is an amenable number.

87040221 is a deficient number, since it is larger than the sum of its proper divisors (36059043).

87040221 is a wasteful number, since it uses less digits than its factorization.

87040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 87040221 is about 9329.5348758660. The cubic root of 87040221 is about 443.1730356211.

Adding to 87040221 its reverse (12204078), we get a palindrome (99244299).

The spelling of 87040221 in words is "eighty-seven million, forty thousand, two hundred twenty-one".