51631949 has 8 divisors (see below), whose sum is σ = 55614240. Its totient is φ = 47776176.

The previous prime is 51631901. The next prime is 51631961. The reversal of 51631949 is 94913615.

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 51631949 - 2¹² = 51627853 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 (51631249) 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, 30782 + ... + 32415.

It is an arithmetic number, because the mean of its divisors is an integer number (6951780).

Almost surely, 2^51631949 is an apocalyptic number.

It is an amenable number.

51631949 is a deficient number, since it is larger than the sum of its proper divisors (3982291).

51631949 is a wasteful number, since it uses less digits than its factorization.

51631949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63259.

The product of its digits is 29160, while the sum is 38.

The square root of 51631949 is about 7185.5374885947. The cubic root of 51631949 is about 372.3684180090.

The spelling of 51631949 in words is "fifty-one million, six hundred thirty-one thousand, nine hundred forty-nine".