51520541542 has 16 divisors (see below), whose sum is σ = 80520829200. Its totient is φ = 24693046560.

The previous prime is 51520541473. The next prime is 51520541551. The reversal of 51520541542 is 24514502515.

It is a junction number, because it is equal to n+sod(n) for n = 51520541498 and 51520541507.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3187209 + ... + 3203332.

It is an arithmetic number, because the mean of its divisors is an integer number (5032551825).

Almost surely, 2^51520541542 is an apocalyptic number.

51520541542 is a deficient number, since it is larger than the sum of its proper divisors (29000287658).

51520541542 is a wasteful number, since it uses less digits than its factorization.

51520541542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390711.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 51520541542 in words is "fifty-one billion, five hundred twenty million, five hundred forty-one thousand, five hundred forty-two".