51427224 has 80 divisors (see below), whose sum is σ = 151661400. Its totient is φ = 16236288.

The previous prime is 51427213. The next prime is 51427247. The reversal of 51427224 is 42272415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10224 + ... + 14400.

Almost surely, 2^51427224 is an apocalyptic number.

51427224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51427224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75830700).

51427224 is an abundant number, since it is smaller than the sum of its proper divisors (100234176).

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

51427224 is a wasteful number, since it uses less digits than its factorization.

51427224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4201 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 51427224 is about 7171.2777104223. The cubic root of 51427224 is about 371.8756087743.

Adding to 51427224 its reverse (42272415), we get a palindrome (93699639).

The spelling of 51427224 in words is "fifty-one million, four hundred twenty-seven thousand, two hundred twenty-four".