523218494 has 4 divisors (see below), whose sum is σ = 784827744. Its totient is φ = 261609246.

The previous prime is 523218463. The next prime is 523218497. The reversal of 523218494 is 494812325.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523218497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130804622 + ... + 130804625.

It is an arithmetic number, because the mean of its divisors is an integer number (196206936).

Almost surely, 2^523218494 is an apocalyptic number.

523218494 is a deficient number, since it is larger than the sum of its proper divisors (261609250).

523218494 is a wasteful number, since it uses less digits than its factorization.

523218494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261609249.

The product of its digits is 69120, while the sum is 38.

The square root of 523218494 is about 22873.9697910092. The cubic root of 523218494 is about 805.8008023274.

The spelling of 523218494 in words is "five hundred twenty-three million, two hundred eighteen thousand, four hundred ninety-four".