87815201 has 4 divisors (see below), whose sum is σ = 88101552. Its totient is φ = 87528852.

The previous prime is 87815191. The next prime is 87815213. The reversal of 87815201 is 10251878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87815201 - 2²² = 83620897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87815291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142715 + ... + 143328.

It is an arithmetic number, because the mean of its divisors is an integer number (22025388).

Almost surely, 2^87815201 is an apocalyptic number.

It is an amenable number.

87815201 is a deficient number, since it is larger than the sum of its proper divisors (286351).

87815201 is a wasteful number, since it uses less digits than its factorization.

87815201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286350.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 87815201 is about 9370.9765232872. The cubic root of 87815201 is about 444.4844443837.

The spelling of 87815201 in words is "eighty-seven million, eight hundred fifteen thousand, two hundred one".