51963418 has 16 divisors (see below), whose sum is σ = 86836680. Its totient is φ = 23155776.

The previous prime is 51963413. The next prime is 51963469. The reversal of 51963418 is 81436915.

It can be written as a sum of positive squares in 4 ways, for example, as 32752729 + 19210689 = 5723^2 + 4383^2 .

It is not an unprimeable number, because it can be changed into a prime (51963413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33705 + ... + 35212.

Almost surely, 2^51963418 is an apocalyptic number.

51963418 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51963418 is a deficient number, since it is larger than the sum of its proper divisors (34873262).

51963418 is a wasteful number, since it uses less digits than its factorization.

51963418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68961.

The product of its digits is 25920, while the sum is 37.

The square root of 51963418 is about 7208.5655993408. The cubic root of 51963418 is about 373.1635677619.

The spelling of 51963418 in words is "fifty-one million, nine hundred sixty-three thousand, four hundred eighteen".