51911908 has 12 divisors (see below), whose sum is σ = 91277872. Its totient is φ = 25832520.

The previous prime is 51911891. The next prime is 51911911. The reversal of 51911908 is 80911915.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 29910 + ... + 31597.

Almost surely, 2^51911908 is an apocalyptic number.

It is an amenable number.

51911908 is a deficient number, since it is larger than the sum of its proper divisors (39365964).

51911908 is a wasteful number, since it uses less digits than its factorization.

51911908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61722 (or 61720 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 51911908 is about 7204.9918806339. The cubic root of 51911908 is about 373.0402245144.

The spelling of 51911908 in words is "fifty-one million, nine hundred eleven thousand, nine hundred eight".