51520227 has 24 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 30769200.

The previous prime is 51520219. The next prime is 51520247. The reversal of 51520227 is 72202515.

It is not a de Polignac number, because 51520227 - 2³ = 51520219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51520197 and 51520206.

It is not an unprimeable number, because it can be changed into a prime (51520247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24774 + ... + 26772.

It is an arithmetic number, because the mean of its divisors is an integer number (3192000).

Almost surely, 2^51520227 is an apocalyptic number.

51520227 is a deficient number, since it is larger than the sum of its proper divisors (25087773).

51520227 is a wasteful number, since it uses less digits than its factorization.

51520227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 51520227 is about 7177.7591907224. The cubic root of 51520227 is about 372.0996452337.

The spelling of 51520227 in words is "fifty-one million, five hundred twenty thousand, two hundred twenty-seven".