51440929 has 8 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 47800896.

The previous prime is 51440927. The next prime is 51440933. The reversal of 51440929 is 92904415.

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

It is a cyclic number.

It is not a de Polignac number, because 51440929 - 2¹ = 51440927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51440894 and 51440903.

It is not an unprimeable number, because it can be changed into a prime (51440927) 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 7 ways as a sum of consecutive naturals, for example, 17809 + ... + 20494.

It is an arithmetic number, because the mean of its divisors is an integer number (6894720).

Almost surely, 2^51440929 is an apocalyptic number.

It is an amenable number.

51440929 is a deficient number, since it is larger than the sum of its proper divisors (3716831).

51440929 is a wasteful number, since it uses less digits than its factorization.

51440929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38399.

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

The square root of 51440929 is about 7172.2331947588. The cubic root of 51440929 is about 371.9086399340.

The spelling of 51440929 in words is "fifty-one million, four hundred forty thousand, nine hundred twenty-nine".