51969429 has 12 divisors (see below), whose sum is σ = 75129600. Its totient is φ = 34617384.

The previous prime is 51969367. The next prime is 51969431. The reversal of 51969429 is 92496915.

It is not a de Polignac number, because 51969429 - 2¹¹ = 51967381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51969469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18862 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (6260800).

Almost surely, 2^51969429 is an apocalyptic number.

It is an amenable number.

51969429 is a deficient number, since it is larger than the sum of its proper divisors (23160171).

51969429 is a wasteful number, since it uses less digits than its factorization.

51969429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824 (or 4821 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 51969429 is about 7208.9825218265. The cubic root of 51969429 is about 373.1779560874.

The spelling of 51969429 in words is "fifty-one million, nine hundred sixty-nine thousand, four hundred twenty-nine".