51493850 has 48 divisors (see below), whose sum is σ = 104959800. Its totient is φ = 18708480.

The previous prime is 51493847. The next prime is 51493853. The reversal of 51493850 is 5839415.

It is an interprime number because it is at equal distance from previous prime (51493847) and next prime (51493853).

It can be written as a sum of positive squares in 12 ways, for example, as 17749369 + 33744481 = 4213^2 + 5809^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51493850.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51493853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23606 + ... + 25694.

Almost surely, 2^51493850 is an apocalyptic number.

51493850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51493850 is an abundant number, since it is smaller than the sum of its proper divisors (53465950).

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

51493850 is a wasteful number, since it uses less digits than its factorization.

51493850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147 (or 2142 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 51493850 is about 7175.9215436068. The cubic root of 51493850 is about 372.0361326525.

The spelling of 51493850 in words is "fifty-one million, four hundred ninety-three thousand, eight hundred fifty".