51451248 has 60 divisors (see below), whose sum is σ = 141232280. Its totient is φ = 16137216.

The previous prime is 51451219. The next prime is 51451261. The reversal of 51451248 is 84215415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12018 + ... + 15726.

Almost surely, 2^51451248 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 51451248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70616140).

51451248 is an abundant number, since it is smaller than the sum of its proper divisors (89781032).

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

51451248 is a wasteful number, since it uses less digits than its factorization.

51451248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754 (or 3731 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 51451248 is about 7172.9525301650. The cubic root of 51451248 is about 371.9335064411.

The spelling of 51451248 in words is "fifty-one million, four hundred fifty-one thousand, two hundred forty-eight".