51158224 has 40 divisors (see below), whose sum is σ = 107180640. Its totient is φ = 23515008.

The previous prime is 51158209. The next prime is 51158227. The reversal of 51158224 is 42285115.

It is a junction number, because it is equal to n+sod(n) for n = 51158192 and 51158201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51158227) by changing a digit.

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, 86859 + ... + 87445.

It is an arithmetic number, because the mean of its divisors is an integer number (2679516).

Almost surely, 2^51158224 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 51158224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53590320).

51158224 is an abundant number, since it is smaller than the sum of its proper divisors (56022416).

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

51158224 is a wasteful number, since it uses less digits than its factorization.

51158224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1021 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The square root of 51158224 is about 7152.4977455432. The cubic root of 51158224 is about 371.2260859715.

The spelling of 51158224 in words is "fifty-one million, one hundred fifty-eight thousand, two hundred twenty-four".