87001533 has 12 divisors (see below), whose sum is σ = 130323648. Its totient is φ = 58000860.

The previous prime is 87001517. The next prime is 87001553. The reversal of 87001533 is 33510078.

It is not a de Polignac number, because 87001533 - 2⁴ = 87001517 is a prime.

It is a super-3 number, since 3×87001533³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 87001497 and 87001506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87001553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178773 + ... + 179258.

It is an arithmetic number, because the mean of its divisors is an integer number (10860304).

Almost surely, 2^87001533 is an apocalyptic number.

It is an amenable number.

87001533 is a deficient number, since it is larger than the sum of its proper divisors (43322115).

87001533 is an equidigital number, since it uses as much as digits as its factorization.

87001533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358046 (or 358034 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 87001533 is about 9327.4612301526. The cubic root of 87001533 is about 443.1073647579.

The spelling of 87001533 in words is "eighty-seven million, one thousand, five hundred thirty-three".