542523521 has 8 divisors (see below), whose sum is σ = 559442688. Its totient is φ = 525780000.

The previous prime is 542523481. The next prime is 542523539. The reversal of 542523521 is 125325245.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542523521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542523571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37625 + ... + 50006.

It is an arithmetic number, because the mean of its divisors is an integer number (69930336).

Almost surely, 2^542523521 is an apocalyptic number.

It is an amenable number.

542523521 is a deficient number, since it is larger than the sum of its proper divisors (16919167).

542523521 is a wasteful number, since it uses less digits than its factorization.

542523521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87823.

The product of its digits is 12000, while the sum is 29.

The square root of 542523521 is about 23292.1343161162. The cubic root of 542523521 is about 815.5918122382.

Adding to 542523521 its reverse (125325245), we get a palindrome (667848766).

The spelling of 542523521 in words is "five hundred forty-two million, five hundred twenty-three thousand, five hundred twenty-one".