51001056 has 48 divisors (see below), whose sum is σ = 148755600. Its totient is φ = 17000064.

The previous prime is 51001043. The next prime is 51001109. The reversal of 51001056 is 65010015.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51001056² = 5202215426230272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28651 + ... + 30378.

It is an arithmetic number, because the mean of its divisors is an integer number (3099075).

Almost surely, 2^51001056 is an apocalyptic number.

It is an amenable number.

51001056 is an abundant number, since it is smaller than the sum of its proper divisors (97754544).

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

51001056 is a wasteful number, since it uses less digits than its factorization.

51001056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59048 (or 59034 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51001056 is about 7141.5023629486. The cubic root of 51001056 is about 370.8455364526.

The spelling of 51001056 in words is "fifty-one million, one thousand, fifty-six".