51943456 has 12 divisors (see below), whose sum is σ = 102263742. Its totient is φ = 25971712.

The previous prime is 51943447. The next prime is 51943457. The reversal of 51943456 is 65434915.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 23853456 = 5300^2 + 4884^2 .

It is not an unprimeable number, because it can be changed into a prime (51943457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811585 + ... + 811648.

Almost surely, 2^51943456 is an apocalyptic number.

It is an amenable number.

51943456 is a deficient number, since it is larger than the sum of its proper divisors (50320286).

51943456 is a wasteful number, since it uses less digits than its factorization.

51943456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623243 (or 1623235 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 51943456 is about 7207.1808635555. The cubic root of 51943456 is about 373.1157774413.

The spelling of 51943456 in words is "fifty-one million, nine hundred forty-three thousand, four hundred fifty-six".