51257227 has 16 divisors (see below), whose sum is σ = 62216640. Its totient is φ = 41223168.

The previous prime is 51257189. The next prime is 51257249. The reversal of 51257227 is 72275215.

It is a de Polignac number, because none of the positive numbers 2^k-51257227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67333 + ... + 68089.

It is an arithmetic number, because the mean of its divisors is an integer number (3888540).

Almost surely, 2^51257227 is an apocalyptic number.

51257227 is a deficient number, since it is larger than the sum of its proper divisors (10959413).

51257227 is a wasteful number, since it uses less digits than its factorization.

51257227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its digits is 9800, while the sum is 31.

The square root of 51257227 is about 7159.4152694197. The cubic root of 51257227 is about 371.4654011169.

The spelling of 51257227 in words is "fifty-one million, two hundred fifty-seven thousand, two hundred twenty-seven".