51323686 has 4 divisors (see below), whose sum is σ = 76985532. Its totient is φ = 25661842.

The previous prime is 51323659. The next prime is 51323711. The reversal of 51323686 is 68632315.

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, 12830920 + ... + 12830923.

It is an arithmetic number, because the mean of its divisors is an integer number (19246383).

Almost surely, 2^51323686 is an apocalyptic number.

51323686 is a deficient number, since it is larger than the sum of its proper divisors (25661846).

51323686 is a wasteful number, since it uses less digits than its factorization.

51323686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661845.

The product of its digits is 25920, while the sum is 34.

The square root of 51323686 is about 7164.0551365829. The cubic root of 51323686 is about 371.6258764201.

The spelling of 51323686 in words is "fifty-one million, three hundred twenty-three thousand, six hundred eighty-six".