51344420 has 24 divisors (see below), whose sum is σ = 114166584. Its totient is φ = 19329536.

The previous prime is 51344417. The next prime is 51344459. The reversal of 51344420 is 2444315.

It can be written as a sum of positive squares in 4 ways, for example, as 763876 + 50580544 = 874^2 + 7112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75167 + ... + 75846.

It is an arithmetic number, because the mean of its divisors is an integer number (4756941).

Almost surely, 2^51344420 is an apocalyptic number.

It is an amenable number.

51344420 is an abundant number, since it is smaller than the sum of its proper divisors (62822164).

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

51344420 is a wasteful number, since it uses less digits than its factorization.

51344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151039 (or 151037 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 51344420 is about 7165.5020759190. The cubic root of 51344420 is about 371.6759134443.

Adding to 51344420 its reverse (2444315), we get a palindrome (53788735).

The spelling of 51344420 in words is "fifty-one million, three hundred forty-four thousand, four hundred twenty".