51511112 has 8 divisors (see below), whose sum is σ = 96583350. Its totient is φ = 25755552.

The previous prime is 51511091. The next prime is 51511127. The reversal of 51511112 is 21111515.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 5080516 = 6814^2 + 2254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219437 + ... + 3219452.

Almost surely, 2^51511112 is an apocalyptic number.

It is an amenable number.

51511112 is a deficient number, since it is larger than the sum of its proper divisors (45072238).

51511112 is a wasteful number, since it uses less digits than its factorization.

51511112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438895 (or 6438891 counting only the distinct ones).

The product of its digits is 50, while the sum is 17.

The square root of 51511112 is about 7177.1242151714. The cubic root of 51511112 is about 372.0776998833.

Adding to 51511112 its reverse (21111515), we get a palindrome (72622627).

The spelling of 51511112 in words is "fifty-one million, five hundred eleven thousand, one hundred twelve".