51850281 has 32 divisors (see below), whose sum is σ = 82656000. Its totient is φ = 28882560.

The previous prime is 51850273. The next prime is 51850339. The reversal of 51850281 is 18205815.

It is not a de Polignac number, because 51850281 - 2³ = 51850273 is a prime.

It is a super-2 number, since 2×51850281² = 5376903279557922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51850241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41575 + ... + 42803.

It is an arithmetic number, because the mean of its divisors is an integer number (2583000).

Almost surely, 2^51850281 is an apocalyptic number.

It is an amenable number.

51850281 is a deficient number, since it is larger than the sum of its proper divisors (30805719).

51850281 is a wasteful number, since it uses less digits than its factorization.

51850281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 51850281 is about 7200.7139229385. The cubic root of 51850281 is about 372.8925483578.

The spelling of 51850281 in words is "fifty-one million, eight hundred fifty thousand, two hundred eighty-one".