521332542 has 12 divisors (see below), whose sum is σ = 1129553880. Its totient is φ = 173777508.

The previous prime is 521332501. The next prime is 521332547. The reversal of 521332542 is 245233125.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521332547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14481442 + ... + 14481477.

It is an arithmetic number, because the mean of its divisors is an integer number (94129490).

Almost surely, 2^521332542 is an apocalyptic number.

521332542 is an abundant number, since it is smaller than the sum of its proper divisors (608221338).

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

521332542 is a wasteful number, since it uses less digits than its factorization.

521332542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28962927 (or 28962924 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 521332542 is about 22832.7077237896. The cubic root of 521332542 is about 804.8314614437.

Adding to 521332542 its reverse (245233125), we get a palindrome (766565667).

The spelling of 521332542 in words is "five hundred twenty-one million, three hundred thirty-two thousand, five hundred forty-two".