87185522 has 8 divisors (see below), whose sum is σ = 130929372. Its totient is φ = 43542400.

The previous prime is 87185521. The next prime is 87185533. The reversal of 87185522 is 22558178.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75151561 + 12033961 = 8669^2 + 3469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (87185521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22979 + ... + 26502.

Almost surely, 2^87185522 is an apocalyptic number.

87185522 is a deficient number, since it is larger than the sum of its proper divisors (43743850).

87185522 is a wasteful number, since it uses less digits than its factorization.

87185522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50364.

The product of its digits is 44800, while the sum is 38.

The square root of 87185522 is about 9337.3187800353. The cubic root of 87185522 is about 443.4195028514.

It can be divided in two parts, 87185 and 522, that multiplied together give a triangular number (45510570 = T₉₅₄₀).

The spelling of 87185522 in words is "eighty-seven million, one hundred eighty-five thousand, five hundred twenty-two".