51688412 has 6 divisors (see below), whose sum is σ = 90454728. Its totient is φ = 25844204.

The previous prime is 51688397. The next prime is 51688447. The reversal of 51688412 is 21488615.

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, 6461048 + ... + 6461055.

It is an arithmetic number, because the mean of its divisors is an integer number (15075788).

Almost surely, 2^51688412 is an apocalyptic number.

It is an amenable number.

51688412 is a deficient number, since it is larger than the sum of its proper divisors (38766316).

51688412 is a wasteful number, since it uses less digits than its factorization.

51688412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922107 (or 12922105 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 51688412 is about 7189.4653486890. The cubic root of 51688412 is about 372.5041051752.

The spelling of 51688412 in words is "fifty-one million, six hundred eighty-eight thousand, four hundred twelve".