51239229 has 8 divisors (see below), whose sum is σ = 68381280. Its totient is φ = 34128336.

The previous prime is 51239203. The next prime is 51239231. The reversal of 51239229 is 92293215.

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

It is not a de Polignac number, because 51239229 - 2⁸ = 51238973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51239229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51239269) 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, 3634 + ... + 10755.

It is an arithmetic number, because the mean of its divisors is an integer number (8547660).

Almost surely, 2^51239229 is an apocalyptic number.

It is an amenable number.

51239229 is a deficient number, since it is larger than the sum of its proper divisors (17142051).

51239229 is a wasteful number, since it uses less digits than its factorization.

51239229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15579.

The product of its digits is 9720, while the sum is 33.

The square root of 51239229 is about 7158.1582128366. The cubic root of 51239229 is about 371.4219183579.

The spelling of 51239229 in words is "fifty-one million, two hundred thirty-nine thousand, two hundred twenty-nine".