51242929 has 4 divisors (see below), whose sum is σ = 51287076. Its totient is φ = 51198784.

The previous prime is 51242927. The next prime is 51242957. The reversal of 51242929 is 92924215.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12616704 + 38626225 = 3552^2 + 6215^2 .

It is a cyclic number.

It is not a de Polignac number, because 51242929 - 2¹ = 51242927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51242894 and 51242903.

It is not an unprimeable number, because it can be changed into a prime (51242921) 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, 20284 + ... + 22669.

It is an arithmetic number, because the mean of its divisors is an integer number (12821769).

Almost surely, 2^51242929 is an apocalyptic number.

It is an amenable number.

51242929 is a deficient number, since it is larger than the sum of its proper divisors (44147).

51242929 is a wasteful number, since it uses less digits than its factorization.

51242929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44146.

The product of its digits is 12960, while the sum is 34.

The square root of 51242929 is about 7158.4166545403. The cubic root of 51242929 is about 371.4308583052.

The spelling of 51242929 in words is "fifty-one million, two hundred forty-two thousand, nine hundred twenty-nine".