51349786 has 4 divisors (see below), whose sum is σ = 77024682. Its totient is φ = 25674892.

The previous prime is 51349769. The next prime is 51349787. The reversal of 51349786 is 68794315.

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

It can be written as a sum of positive squares in only one way, i.e., 46662561 + 4687225 = 6831^2 + 2165^2 .

It is not an unprimeable number, because it can be changed into a prime (51349787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12837445 + ... + 12837448.

Almost surely, 2^51349786 is an apocalyptic number.

51349786 is a deficient number, since it is larger than the sum of its proper divisors (25674896).

51349786 is a wasteful number, since it uses less digits than its factorization.

51349786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25674895.

The product of its digits is 181440, while the sum is 43.

The square root of 51349786 is about 7165.8764990753. The cubic root of 51349786 is about 371.6888609303.

The spelling of 51349786 in words is "fifty-one million, three hundred forty-nine thousand, seven hundred eighty-six".