51768250 has 16 divisors (see below), whose sum is σ = 96910632. Its totient is φ = 20707200.

The previous prime is 51768229. The next prime is 51768263. The reversal of 51768250 is 5286715.

It can be written as a sum of positive squares in 4 ways, for example, as 18740241 + 33028009 = 4329^2 + 5747^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103287 + ... + 103786.

Almost surely, 2^51768250 is an apocalyptic number.

51768250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51768250 is a deficient number, since it is larger than the sum of its proper divisors (45142382).

51768250 is a wasteful number, since it uses less digits than its factorization.

51768250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207090 (or 207080 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 51768250 is about 7195.0156358412. The cubic root of 51768250 is about 372.6957966498.

The spelling of 51768250 in words is "fifty-one million, seven hundred sixty-eight thousand, two hundred fifty".