87201321 has 8 divisors (see below), whose sum is σ = 116351424. Its totient is φ = 58092720.

The previous prime is 87201319. The next prime is 87201343. The reversal of 87201321 is 12310278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87201321 - 2¹ = 87201319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87201291 and 87201300.

It is not an unprimeable number, because it can be changed into a prime (87201421) 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, 5086 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (14543928).

Almost surely, 2^87201321 is an apocalyptic number.

It is an amenable number.

87201321 is a deficient number, since it is larger than the sum of its proper divisors (29150103).

87201321 is a wasteful number, since it uses less digits than its factorization.

87201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20751.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 87201321 is about 9338.1647554538. The cubic root of 87201321 is about 443.4462854388.

Adding to 87201321 its reverse (12310278), we get a palindrome (99511599).

The spelling of 87201321 in words is "eighty-seven million, two hundred one thousand, three hundred twenty-one".