87210253 has 12 divisors (see below), whose sum is σ = 95741940. Its totient is φ = 79387776.

The previous prime is 87210229. The next prime is 87210287. The reversal of 87210253 is 35201278.

It can be written as a sum of positive squares in 6 ways, for example, as 15350724 + 71859529 = 3918^2 + 8477^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87210253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87210293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8803 + ... + 15871.

It is an arithmetic number, because the mean of its divisors is an integer number (7978495).

Almost surely, 2^87210253 is an apocalyptic number.

It is an amenable number.

87210253 is a deficient number, since it is larger than the sum of its proper divisors (8531687).

87210253 is a wasteful number, since it uses less digits than its factorization.

87210253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7168 (or 7155 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 87210253 is about 9338.6429956391. The cubic root of 87210253 is about 443.4614256032.

The spelling of 87210253 in words is "eighty-seven million, two hundred ten thousand, two hundred fifty-three".