87215201 has 2 divisors, whose sum is σ = 87215202. Its totient is φ = 87215200.

The previous prime is 87215189. The next prime is 87215203. The reversal of 87215201 is 10251278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73702225 + 13512976 = 8585^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 87215201 - 2¹⁴ = 87198817 is a prime.

Together with 87215203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87215203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43607600 + 43607601.

It is an arithmetic number, because the mean of its divisors is an integer number (43607601).

Almost surely, 2^87215201 is an apocalyptic number.

It is an amenable number.

87215201 is a deficient number, since it is larger than the sum of its proper divisors (1).

87215201 is an equidigital number, since it uses as much as digits as its factorization.

87215201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 87215201 is about 9338.9079125988. The cubic root of 87215201 is about 443.4698122533.

Adding to 87215201 its reverse (10251278), we get a palindrome (97466479).

The spelling of 87215201 in words is "eighty-seven million, two hundred fifteen thousand, two hundred one".