51637248 has 132 divisors (see below), whose sum is σ = 160943328. Its totient is φ = 15851520.

The previous prime is 51637247. The next prime is 51637253. The reversal of 51637248 is 84273615.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51637247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119593 + ... + 120023.

Almost surely, 2^51637248 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 51637248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80471664).

51637248 is an abundant number, since it is smaller than the sum of its proper divisors (109306080).

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

51637248 is a wasteful number, since it uses less digits than its factorization.

51637248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 449 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51637248 is about 7185.9062059005. The cubic root of 51637248 is about 372.3811563282.

The spelling of 51637248 in words is "fifty-one million, six hundred thirty-seven thousand, two hundred forty-eight".