51251224 has 16 divisors (see below), whose sum is σ = 97672320. Its totient is φ = 25205280.

The previous prime is 51251219. The next prime is 51251269. The reversal of 51251224 is 42215215.

It is a super-2 number, since 2×51251224² = 5253375922996352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51251195 and 51251204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52024 + ... + 52999.

It is an arithmetic number, because the mean of its divisors is an integer number (6104520).

Almost surely, 2^51251224 is an apocalyptic number.

It is an amenable number.

51251224 is a deficient number, since it is larger than the sum of its proper divisors (46421096).

51251224 is a wasteful number, since it uses less digits than its factorization.

51251224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105090 (or 105086 counting only the distinct ones).

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

The square root of 51251224 is about 7158.9960189960. The cubic root of 51251224 is about 371.4508991368.

Adding to 51251224 its reverse (42215215), we get a palindrome (93466439).

The spelling of 51251224 in words is "fifty-one million, two hundred fifty-one thousand, two hundred twenty-four".