51085111425 has 48 divisors (see below), whose sum is σ = 89555309760. Its totient is φ = 25622922240.

The previous prime is 51085111411. The next prime is 51085111439. The reversal of 51085111425 is 52411158015.

It is an interprime number because it is at equal distance from previous prime (51085111411) and next prime (51085111439).

It is not a de Polignac number, because 51085111425 - 2⁹ = 51085110913 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64389 + ... + 326061.

It is an arithmetic number, because the mean of its divisors is an integer number (1865735620).

Almost surely, 2^51085111425 is an apocalyptic number.

It is an amenable number.

51085111425 is a deficient number, since it is larger than the sum of its proper divisors (38470198335).

51085111425 is a wasteful number, since it uses less digits than its factorization.

51085111425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261842 (or 261837 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 33.

The spelling of 51085111425 in words is "fifty-one billion, eighty-five million, one hundred eleven thousand, four hundred twenty-five".