51911864 has 16 divisors (see below), whose sum is σ = 97831800. Its totient is φ = 25823392.

The previous prime is 51911807. The next prime is 51911891. The reversal of 51911864 is 46811915.

It is a congruent number.

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, 14894 + ... + 18045.

Almost surely, 2^51911864 is an apocalyptic number.

It is an amenable number.

51911864 is a deficient number, since it is larger than the sum of its proper divisors (45919936).

51911864 is a wasteful number, since it uses less digits than its factorization.

51911864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33142 (or 33138 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 51911864 is about 7204.9888271947. The cubic root of 51911864 is about 373.0401191193.

The spelling of 51911864 in words is "fifty-one million, nine hundred eleven thousand, eight hundred sixty-four".