51423868 has 6 divisors (see below), whose sum is σ = 89991776. Its totient is φ = 25711932.

The previous prime is 51423859. The next prime is 51423893. The reversal of 51423868 is 86832415.

It is a happy number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6427980 + ... + 6427987.

Almost surely, 2^51423868 is an apocalyptic number.

It is an amenable number.

51423868 is a deficient number, since it is larger than the sum of its proper divisors (38567908).

51423868 is a wasteful number, since it uses less digits than its factorization.

51423868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855971 (or 12855969 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 51423868 is about 7171.0437176188. The cubic root of 51423868 is about 371.8675194032.

The spelling of 51423868 in words is "fifty-one million, four hundred twenty-three thousand, eight hundred sixty-eight".