987225523 has 4 divisors (see below), whose sum is σ = 988040608. Its totient is φ = 986410440.

The previous prime is 987225401. The next prime is 987225529. The reversal of 987225523 is 325522789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987225523 - 2²⁵ = 953671091 is a prime.

It is a super-2 number, since 2×987225523² = 1949228466525247058, 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 987225523.

It is not an unprimeable number, because it can be changed into a prime (987225529) 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, 405723 + ... + 408148.

It is an arithmetic number, because the mean of its divisors is an integer number (247010152).

Almost surely, 2^987225523 is an apocalyptic number.

987225523 is a deficient number, since it is larger than the sum of its proper divisors (815085).

987225523 is a wasteful number, since it uses less digits than its factorization.

987225523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815084.

The product of its digits is 302400, while the sum is 43.

The square root of 987225523 is about 31420.1451778950. The cubic root of 987225523 is about 995.7235792947.

The spelling of 987225523 in words is "nine hundred eighty-seven million, two hundred twenty-five thousand, five hundred twenty-three".