51047944 has 8 divisors (see below), whose sum is σ = 95714910. Its totient is φ = 25523968.

The previous prime is 51047929. The next prime is 51047959. The reversal of 51047944 is 44974015.

It is an interprime number because it is at equal distance from previous prime (51047929) and next prime (51047959).

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 11985444 = 6250^2 + 3462^2 .

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

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 as a sum of consecutive naturals, namely, 3190489 + ... + 3190504.

Almost surely, 2^51047944 is an apocalyptic number.

It is an amenable number.

51047944 is a deficient number, since it is larger than the sum of its proper divisors (44666966).

51047944 is a wasteful number, since it uses less digits than its factorization.

51047944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380999 (or 6380995 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 51047944 is about 7144.7843914285. The cubic root of 51047944 is about 370.9591476924.

The spelling of 51047944 in words is "fifty-one million, forty-seven thousand, nine hundred forty-four".