51356544 has 64 divisors (see below), whose sum is σ = 143616000. Its totient is φ = 16215552.

The previous prime is 51356537. The next prime is 51356551. The reversal of 51356544 is 44565315.

It is an interprime number because it is at equal distance from previous prime (51356537) and next prime (51356551).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×51356544² = 5274989223247872, which contains 22 as substring.

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, 3777 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (2244000).

Almost surely, 2^51356544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51356544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71808000).

51356544 is an abundant number, since it is smaller than the sum of its proper divisors (92259456).

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

51356544 is a wasteful number, since it uses less digits than its factorization.

51356544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075 (or 7063 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The square root of 51356544 is about 7166.3480239240. The cubic root of 51356544 is about 371.7051658547.

The spelling of 51356544 in words is "fifty-one million, three hundred fifty-six thousand, five hundred forty-four".