51440829 has 8 divisors (see below), whose sum is σ = 74823072. Its totient is φ = 31176240.

The previous prime is 51440801. The next prime is 51440911. The reversal of 51440829 is 92804415.

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

It is not a de Polignac number, because 51440829 - 2¹³ = 51432637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1558813 = 51440829 / (5 + 1 + 4 + 4 + 0 + 8 + 2 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 51440829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440729) 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, 779374 + ... + 779439.

It is an arithmetic number, because the mean of its divisors is an integer number (9352884).

Almost surely, 2^51440829 is an apocalyptic number.

It is an amenable number.

51440829 is a deficient number, since it is larger than the sum of its proper divisors (23382243).

51440829 is a wasteful number, since it uses less digits than its factorization.

51440829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558827.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 51440829 is about 7172.2262234260. The cubic root of 51440829 is about 371.9083989399.

The spelling of 51440829 in words is "fifty-one million, four hundred forty thousand, eight hundred twenty-nine".