51345224 has 16 divisors (see below), whose sum is σ = 110025600. Its totient is φ = 22005072.

The previous prime is 51345199. The next prime is 51345241. The reversal of 51345224 is 42254315.

It is a happy number.

It is a super-2 number, since 2×51345224² = 5272664055220352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51345193 and 51345202.

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, 458384 + ... + 458495.

It is an arithmetic number, because the mean of its divisors is an integer number (6876600).

Almost surely, 2^51345224 is an apocalyptic number.

It is an amenable number.

51345224 is an abundant number, since it is smaller than the sum of its proper divisors (58680376).

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

51345224 is a wasteful number, since it uses less digits than its factorization.

51345224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916892 (or 916888 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 51345224 is about 7165.5581778393. The cubic root of 51345224 is about 371.6778534530.

Adding to 51345224 its reverse (42254315), we get a palindrome (93599539).

Subtracting from 51345224 its reverse (42254315), we obtain a palindrome (9090909).

The spelling of 51345224 in words is "fifty-one million, three hundred forty-five thousand, two hundred twenty-four".