51227129 has 8 divisors (see below), whose sum is σ = 53476488. Its totient is φ = 49023360.

The previous prime is 51227123. The next prime is 51227149. The reversal of 51227129 is 92172215.

It can be written as a sum of positive squares in 4 ways, for example, as 133225 + 51093904 = 365^2 + 7148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51227129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51227123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9092 + ... + 13605.

It is an arithmetic number, because the mean of its divisors is an integer number (6684561).

Almost surely, 2^51227129 is an apocalyptic number.

It is an amenable number.

51227129 is a deficient number, since it is larger than the sum of its proper divisors (2249359).

51227129 is a wasteful number, since it uses less digits than its factorization.

51227129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22795.

The product of its digits is 2520, while the sum is 29.

The square root of 51227129 is about 7157.3129734559. The cubic root of 51227129 is about 371.3926793086.

The spelling of 51227129 in words is "fifty-one million, two hundred twenty-seven thousand, one hundred twenty-nine".