521522142 has 8 divisors (see below), whose sum is σ = 1043044296. Its totient is φ = 173840712.

The previous prime is 521522137. The next prime is 521522143. The reversal of 521522142 is 241225125.

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

521522142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521522143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43460173 + ... + 43460184.

It is an arithmetic number, because the mean of its divisors is an integer number (130380537).

Almost surely, 2^521522142 is an apocalyptic number.

521522142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

521522142 is a wasteful number, since it uses less digits than its factorization.

521522142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86920362.

The product of its digits is 1600, while the sum is 24.

The square root of 521522142 is about 22836.8592849367. The cubic root of 521522142 is about 804.9290175700.

Adding to 521522142 its reverse (241225125), we get a palindrome (762747267).

The spelling of 521522142 in words is "five hundred twenty-one million, five hundred twenty-two thousand, one hundred forty-two".