523715540 has 12 divisors (see below), whose sum is σ = 1099802676. Its totient is φ = 209486208.

The previous prime is 523715537. The next prime is 523715567. The reversal of 523715540 is 45517325.

It can be written as a sum of positive squares in 2 ways, for example, as 409738564 + 113976976 = 20242^2 + 10676^2 .

It is a junction number, because it is equal to n+sod(n) for n = 523715497 and 523715506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13092869 + ... + 13092908.

It is an arithmetic number, because the mean of its divisors is an integer number (91650223).

Almost surely, 2^523715540 is an apocalyptic number.

It is an amenable number.

523715540 is an abundant number, since it is smaller than the sum of its proper divisors (576087136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523715540 is a wasteful number, since it uses less digits than its factorization.

523715540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26185786 (or 26185784 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 523715540 is about 22884.8320946429. The cubic root of 523715540 is about 806.0558858847.

The spelling of 523715540 in words is "five hundred twenty-three million, seven hundred fifteen thousand, five hundred forty".