51438548 has 48 divisors (see below), whose sum is σ = 111820800. Its totient is φ = 20204640.

The previous prime is 51438533. The next prime is 51438551. The reversal of 51438548 is 84583415.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14933 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (2329600).

Almost surely, 2^51438548 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 51438548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55910400).

51438548 is an abundant number, since it is smaller than the sum of its proper divisors (60382252).

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

51438548 is a wasteful number, since it uses less digits than its factorization.

51438548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180 (or 3178 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 51438548 is about 7172.0672054855. The cubic root of 51438548 is about 371.9029017786.

The spelling of 51438548 in words is "fifty-one million, four hundred thirty-eight thousand, five hundred forty-eight".