51253949 has 8 divisors (see below), whose sum is σ = 52345440. Its totient is φ = 50170000.

The previous prime is 51253919. The next prime is 51253973. The reversal of 51253949 is 94935215.

51253949 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 a de Polignac number, because none of the positive numbers 2^k-51253949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253919) 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, 13079 + ... + 16539.

It is an arithmetic number, because the mean of its divisors is an integer number (6543180).

Almost surely, 2^51253949 is an apocalyptic number.

51253949 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51253949 is a deficient number, since it is larger than the sum of its proper divisors (1091491).

51253949 is a wasteful number, since it uses less digits than its factorization.

51253949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771.

The product of its digits is 48600, while the sum is 38.

The square root of 51253949 is about 7159.1863364491. The cubic root of 51253949 is about 371.4574823016.

The spelling of 51253949 in words is "fifty-one million, two hundred fifty-three thousand, nine hundred forty-nine".