87215652 has 18 divisors (see below), whose sum is σ = 220461878. Its totient is φ = 29071872.

The previous prime is 87215647. The next prime is 87215657. The reversal of 87215652 is 25651278.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87215647) and next prime (87215657).

It can be written as a sum of positive squares in only one way, i.e., 87160896 + 54756 = 9336^2 + 234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2422657 = 87215652 / (8 + 7 + 2 + 1 + 5 + 6 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (87215657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1211293 + ... + 1211364.

Almost surely, 2^87215652 is an apocalyptic number.

It is an amenable number.

87215652 is an abundant number, since it is smaller than the sum of its proper divisors (133246226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87215652 is a wasteful number, since it uses less digits than its factorization.

87215652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422667 (or 2422662 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 87215652 is about 9338.9320588598. The cubic root of 87215652 is about 443.4705766634.

The spelling of 87215652 in words is "eighty-seven million, two hundred fifteen thousand, six hundred fifty-two".