51222724 has 24 divisors (see below), whose sum is σ = 103445888. Its totient is φ = 21738240.

The previous prime is 51222709. The next prime is 51222733. The reversal of 51222724 is 42722215.

It is an unprimeable number.

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, 5997 + ... + 11764.

Almost surely, 2^51222724 is an apocalyptic number.

It is an amenable number.

51222724 is an abundant number, since it is smaller than the sum of its proper divisors (52223164).

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

51222724 is a wasteful number, since it uses less digits than its factorization.

51222724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17875 (or 17873 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 51222724 is about 7157.0052396236. The cubic root of 51222724 is about 371.3820337016.

Adding to 51222724 its reverse (42722215), we get a palindrome (93944939).

The spelling of 51222724 in words is "fifty-one million, two hundred twenty-two thousand, seven hundred twenty-four".