51105278 has 16 divisors (see below), whose sum is σ = 87727104. Its totient is φ = 21872760.

The previous prime is 51105277. The next prime is 51105283. The reversal of 51105278 is 87250115.

It is a super-2 number, since 2×51105278² = 5223498878914568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51105278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10751 + ... + 14757.

It is an arithmetic number, because the mean of its divisors is an integer number (5482944).

Almost surely, 2^51105278 is an apocalyptic number.

51105278 is a deficient number, since it is larger than the sum of its proper divisors (36621826).

51105278 is a wasteful number, since it uses less digits than its factorization.

51105278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 51105278 is about 7148.7955628903. The cubic root of 51105278 is about 371.0979754462.

The spelling of 51105278 in words is "fifty-one million, one hundred five thousand, two hundred seventy-eight".