51113255552 has 32 divisors (see below), whose sum is σ = 102283870080. Its totient is φ = 25442009856.

The previous prime is 51113255549. The next prime is 51113255569. The reversal of 51113255552 is 25555231115.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×51113255552² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866798 + ... + 923885.

It is an arithmetic number, because the mean of its divisors is an integer number (3196370940).

Almost surely, 2^51113255552 is an apocalyptic number.

It is an amenable number.

51113255552 is an abundant number, since it is smaller than the sum of its proper divisors (51170614528).

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

51113255552 is a wasteful number, since it uses less digits than its factorization.

51113255552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790920 (or 1790908 counting only the distinct ones).

The product of its digits is 37500, while the sum is 35.

Adding to 51113255552 its reverse (25555231115), we get a palindrome (76668486667).

The spelling of 51113255552 in words is "fifty-one billion, one hundred thirteen million, two hundred fifty-five thousand, five hundred fifty-two".