51112881 has 12 divisors (see below), whose sum is σ = 73905780. Its totient is φ = 34040160.

The previous prime is 51112879. The next prime is 51112883. The reversal of 51112881 is 18821115.

It is an interprime number because it is at equal distance from previous prime (51112879) and next prime (51112883).

It can be written as a sum of positive squares in 2 ways, for example, as 38750625 + 12362256 = 6225^2 + 3516^2 .

It is not a de Polignac number, because 51112881 - 2¹ = 51112879 is a prime.

It is a super-2 number, since 2×51112881² = 5225053208240322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51112883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8751 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (6158815).

Almost surely, 2^51112881 is an apocalyptic number.

It is an amenable number.

51112881 is a deficient number, since it is larger than the sum of its proper divisors (22792899).

51112881 is a wasteful number, since it uses less digits than its factorization.

51112881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856 (or 5853 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 51112881 is about 7149.3273110133. The cubic root of 51112881 is about 371.1163774463.

Adding to 51112881 its reverse (18821115), we get a palindrome (69933996).

The spelling of 51112881 in words is "fifty-one million, one hundred twelve thousand, eight hundred eighty-one".