51125224 has 8 divisors (see below), whose sum is σ = 95859810. Its totient is φ = 25562608.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125224 is 42252115.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 3928324 = 6870^2 + 1982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×51125224² = 5227577058100352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51125195 and 51125204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195319 + ... + 3195334.

Almost surely, 2^51125224 is an apocalyptic number.

It is an amenable number.

51125224 is a deficient number, since it is larger than the sum of its proper divisors (44734586).

51125224 is a wasteful number, since it uses less digits than its factorization.

51125224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390659 (or 6390655 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 51125224 is about 7150.1904869731. The cubic root of 51125224 is about 371.1462480692.

Adding to 51125224 its reverse (42252115), we get a palindrome (93377339).

The spelling of 51125224 in words is "fifty-one million, one hundred twenty-five thousand, two hundred twenty-four".