51025102542 has 24 divisors (see below), whose sum is σ = 110561833200. Its totient is φ = 17007222240.

The previous prime is 51025102517. The next prime is 51025102543. The reversal of 51025102542 is 24520152015.

51025102542 is a `hidden beast` number, since 5 + 10 + 2 + 5 + 102 + 542 = 666.

It is a super-2 number, since 2×51025102542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51025102543) 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 11 ways as a sum of consecutive naturals, for example, 204834 + ... + 379482.

It is an arithmetic number, because the mean of its divisors is an integer number (4606743050).

Almost surely, 2^51025102542 is an apocalyptic number.

51025102542 is an abundant number, since it is smaller than the sum of its proper divisors (59536730658).

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

51025102542 is a wasteful number, since it uses less digits than its factorization.

51025102542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190888 (or 190885 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 51025102542 its reverse (24520152015), we get a palindrome (75545254557).

The spelling of 51025102542 in words is "fifty-one billion, twenty-five million, one hundred two thousand, five hundred forty-two".