51651049 has 8 divisors (see below), whose sum is σ = 54812160. Its totient is φ = 48503616.

The previous prime is 51651023. The next prime is 51651109. The reversal of 51651049 is 94015615.

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 51651049 - 2²¹ = 49553897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51651049.

It is not an unprimeable number, because it can be changed into a prime (51651949) 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, 4972 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (6851520).

Almost surely, 2^51651049 is an apocalyptic number.

It is an amenable number.

51651049 is a deficient number, since it is larger than the sum of its proper divisors (3161111).

51651049 is a wasteful number, since it uses less digits than its factorization.

51651049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 51651049 is about 7186.8664242492. The cubic root of 51651049 is about 372.4143286005.

The spelling of 51651049 in words is "fifty-one million, six hundred fifty-one thousand, forty-nine".