51149649 has 8 divisors (see below), whose sum is σ = 70551360. Its totient is φ = 32923856.

The previous prime is 51149639. The next prime is 51149687. The reversal of 51149649 is 94694115.

51149649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51149649 - 2⁴ = 51149633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51149629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293877 + ... + 294050.

It is an arithmetic number, because the mean of its divisors is an integer number (8818920).

Almost surely, 2^51149649 is an apocalyptic number.

It is an amenable number.

51149649 is a deficient number, since it is larger than the sum of its proper divisors (19401711).

51149649 is a wasteful number, since it uses less digits than its factorization.

51149649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587959.

The product of its digits is 38880, while the sum is 39.

The square root of 51149649 is about 7151.8982794780. The cubic root of 51149649 is about 371.2053435159.

The spelling of 51149649 in words is "fifty-one million, one hundred forty-nine thousand, six hundred forty-nine".