87213450 has 48 divisors (see below), whose sum is σ = 217173600. Its totient is φ = 23161920.

The previous prime is 87213443. The next prime is 87213457. The reversal of 87213450 is 5431278.

It is an interprime number because it is at equal distance from previous prime (87213443) and next prime (87213457).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (87213457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40501 + ... + 42599.

It is an arithmetic number, because the mean of its divisors is an integer number (4524450).

Almost surely, 2^87213450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87213450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108586800).

87213450 is an abundant number, since it is smaller than the sum of its proper divisors (129960150).

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

87213450 is a wasteful number, since it uses less digits than its factorization.

87213450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391 (or 2386 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 87213450 is about 9338.8141645500. The cubic root of 87213450 is about 443.4668444188.

The spelling of 87213450 in words is "eighty-seven million, two hundred thirteen thousand, four hundred fifty".