51520542042 has 8 divisors (see below), whose sum is σ = 103041084096. Its totient is φ = 17173514012.

The previous prime is 51520542013. The next prime is 51520542043. The reversal of 51520542042 is 24024502515.

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

51520542042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51520542043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4293378498 + ... + 4293378509.

It is an arithmetic number, because the mean of its divisors is an integer number (12880135512).

Almost surely, 2^51520542042 is an apocalyptic number.

51520542042 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.

51520542042 is a wasteful number, since it uses less digits than its factorization.

51520542042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586757012.

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 51520542042 in words is "fifty-one billion, five hundred twenty million, five hundred forty-two thousand, forty-two".