51146686 has 4 divisors (see below), whose sum is σ = 76720032. Its totient is φ = 25573342.

The previous prime is 51146671. The next prime is 51146699. The reversal of 51146686 is 68664115.

It is a semiprime because it is the product of two primes.

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, 12786670 + ... + 12786673.

It is an arithmetic number, because the mean of its divisors is an integer number (19180008).

Almost surely, 2^51146686 is an apocalyptic number.

51146686 is a deficient number, since it is larger than the sum of its proper divisors (25573346).

51146686 is a wasteful number, since it uses less digits than its factorization.

51146686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25573345.

The product of its digits is 34560, while the sum is 37.

The square root of 51146686 is about 7151.6911286772. The cubic root of 51146686 is about 371.1981756422.

The spelling of 51146686 in words is "fifty-one million, one hundred forty-six thousand, six hundred eighty-six".