51183766 has 4 divisors (see below), whose sum is σ = 76775652. Its totient is φ = 25591882.

The previous prime is 51183761. The next prime is 51183817. The reversal of 51183766 is 66738115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66738115 = 5 ⋅13347623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51183761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795940 + ... + 12795943.

It is an arithmetic number, because the mean of its divisors is an integer number (19193913).

Almost surely, 2^51183766 is an apocalyptic number.

51183766 is a deficient number, since it is larger than the sum of its proper divisors (25591886).

51183766 is a wasteful number, since it uses less digits than its factorization.

51183766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25591885.

The product of its digits is 30240, while the sum is 37.

The square root of 51183766 is about 7154.2830528293. The cubic root of 51183766 is about 371.2878569398.

The spelling of 51183766 in words is "fifty-one million, one hundred eighty-three thousand, seven hundred sixty-six".