87221250 has 60 divisors (see below), whose sum is σ = 236179086. Its totient is φ = 23256000.

The previous prime is 87221231. The next prime is 87221269. The reversal of 87221250 is 5212278.

It is an interprime number because it is at equal distance from previous prime (87221231) and next prime (87221269).

It can be written as a sum of positive squares in 5 ways, for example, as 17715681 + 69505569 = 4209^2 + 8337^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 7374 + ... + 15126.

Almost surely, 2^87221250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87221250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118089543).

87221250 is an abundant number, since it is smaller than the sum of its proper divisors (148957836).

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

87221250 is a wasteful number, since it uses less digits than its factorization.

87221250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7781 (or 7763 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 87221250 is about 9339.2317671209. The cubic root of 87221250 is about 443.4800646208.

It can be divided in two parts, 872 and 21250, that added together give a palindrome (22122).

The spelling of 87221250 in words is "eighty-seven million, two hundred twenty-one thousand, two hundred fifty".