51149056 has 144 divisors (see below), whose sum is σ = 130685184. Its totient is φ = 19464192.

The previous prime is 51149051. The next prime is 51149089. The reversal of 51149056 is 65094115.

It is a super-2 number, since 2×51149056² = 5232451859382272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51149051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700636 + ... + 700708.

It is an arithmetic number, because the mean of its divisors is an integer number (907536).

Almost surely, 2^51149056 is an apocalyptic number.

51149056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51149056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65342592).

51149056 is an abundant number, since it is smaller than the sum of its proper divisors (79536128).

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

51149056 is a wasteful number, since it uses less digits than its factorization.

51149056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 51149056 is about 7151.8568218331. The cubic root of 51149056 is about 371.2039089957.

The spelling of 51149056 in words is "fifty-one million, one hundred forty-nine thousand, fifty-six".