87812550 has 144 divisors (see below), whose sum is σ = 274646112. Its totient is φ = 19699200.

The previous prime is 87812533. The next prime is 87812561. The reversal of 87812550 is 5521878.

It is a super-2 number, since 2×87812550² = 15422087875005000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 191922 + ... + 192378.

Almost surely, 2^87812550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87812550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137323056).

87812550 is an abundant number, since it is smaller than the sum of its proper divisors (186833562).

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

87812550 is a wasteful number, since it uses less digits than its factorization.

87812550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 87812550 is about 9370.8350748479. The cubic root of 87812550 is about 444.4799715813.

The spelling of 87812550 in words is "eighty-seven million, eight hundred twelve thousand, five hundred fifty".