87103531 has 4 divisors (see below), whose sum is σ = 87249064. Its totient is φ = 86958000.

The previous prime is 87103517. The next prime is 87103561. The reversal of 87103531 is 13530178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13530178 = 2 ⋅6765089.

It is a cyclic number.

It is not a de Polignac number, because 87103531 - 2⁷ = 87103403 is a prime.

It is a super-2 number, since 2×87103531² = 15174050225335922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87103531.

It is not an unprimeable number, because it can be changed into a prime (87103561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71865 + ... + 73066.

It is an arithmetic number, because the mean of its divisors is an integer number (21812266).

Almost surely, 2^87103531 is an apocalyptic number.

87103531 is a deficient number, since it is larger than the sum of its proper divisors (145533).

87103531 is a wasteful number, since it uses less digits than its factorization.

87103531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145532.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 87103531 is about 9332.9272471181. The cubic root of 87103531 is about 443.2804590807.

The spelling of 87103531 in words is "eighty-seven million, one hundred three thousand, five hundred thirty-one".