51002251542 has 48 divisors (see below), whose sum is σ = 120584589840. Its totient is φ = 15450892800.

The previous prime is 51002251529. The next prime is 51002251571. The reversal of 51002251542 is 24515220015.

51002251542 is a `hidden beast` number, since 5 + 100 + 2 + 2 + 515 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 710434 + ... + 778922.

It is an arithmetic number, because the mean of its divisors is an integer number (2512178955).

Almost surely, 2^51002251542 is an apocalyptic number.

51002251542 is an abundant number, since it is smaller than the sum of its proper divisors (69582338298).

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

51002251542 is a wasteful number, since it uses less digits than its factorization.

51002251542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72269 (or 72266 counting only the distinct ones).

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

Adding to 51002251542 its reverse (24515220015), we get a palindrome (75517471557).

The spelling of 51002251542 in words is "fifty-one billion, two million, two hundred fifty-one thousand, five hundred forty-two".