51540227 has 4 divisors (see below), whose sum is σ = 51911160. Its totient is φ = 51169296.

The previous prime is 51540211. The next prime is 51540233. The reversal of 51540227 is 72204515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51540227 - 2⁴ = 51540211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51540196 and 51540205.

It is not an unprimeable number, because it can be changed into a prime (51540287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185258 + ... + 185535.

It is an arithmetic number, because the mean of its divisors is an integer number (12977790).

Almost surely, 2^51540227 is an apocalyptic number.

51540227 is a deficient number, since it is larger than the sum of its proper divisors (370933).

51540227 is a wasteful number, since it uses less digits than its factorization.

51540227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370932.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 51540227 is about 7179.1522480025. The cubic root of 51540227 is about 372.1477883324.

The spelling of 51540227 in words is "fifty-one million, five hundred forty thousand, two hundred twenty-seven".