87244581 has 16 divisors (see below), whose sum is σ = 117849600. Its totient is φ = 57405888.

The previous prime is 87244567. The next prime is 87244583. The reversal of 87244581 is 18544278.

It is a happy number.

It is not a de Polignac number, because 87244581 - 2⁶ = 87244517 is a prime.

It is a super-2 number, since 2×87244581² = 15223233827731122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87244583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156355 + ... + 156911.

It is an arithmetic number, because the mean of its divisors is an integer number (7365600).

Almost surely, 2^87244581 is an apocalyptic number.

It is an amenable number.

87244581 is a deficient number, since it is larger than the sum of its proper divisors (30605019).

87244581 is a wasteful number, since it uses less digits than its factorization.

87244581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 71680, while the sum is 39.

The square root of 87244581 is about 9340.4807692110. The cubic root of 87244581 is about 443.5196035748.

The spelling of 87244581 in words is "eighty-seven million, two hundred forty-four thousand, five hundred eighty-one".