51420044 has 24 divisors (see below), whose sum is σ = 97252848. Its totient is φ = 23647680.

The previous prime is 51420037. The next prime is 51420079. The reversal of 51420044 is 44002415.

It is a junction number, because it is equal to n+sod(n) for n = 51419998 and 51420025.

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, 14354 + ... + 17574.

It is an arithmetic number, because the mean of its divisors is an integer number (4052202).

Almost surely, 2^51420044 is an apocalyptic number.

It is an amenable number.

51420044 is a deficient number, since it is larger than the sum of its proper divisors (45832804).

51420044 is a wasteful number, since it uses less digits than its factorization.

51420044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 51420044 is about 7170.7770848075. Note that the first 3 decimals coincide. The cubic root of 51420044 is about 371.8583015264.

Adding to 51420044 its reverse (44002415), we get a palindrome (95422459).

The spelling of 51420044 in words is "fifty-one million, four hundred twenty thousand, forty-four".