51551246 has 16 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 25506360.

The previous prime is 51551243. The next prime is 51551261. The reversal of 51551246 is 64215515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51551243) 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, 122825 + ... + 123243.

It is an arithmetic number, because the mean of its divisors is an integer number (4883760).

Almost surely, 2^51551246 is an apocalyptic number.

51551246 is a deficient number, since it is larger than the sum of its proper divisors (26588914).

51551246 is a wasteful number, since it uses less digits than its factorization.

51551246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its digits is 6000, while the sum is 29.

The square root of 51551246 is about 7179.9196374333. The cubic root of 51551246 is about 372.1743074517.

The spelling of 51551246 in words is "fifty-one million, five hundred fifty-one thousand, two hundred forty-six".