51340018 has 4 divisors (see below), whose sum is σ = 77010030. Its totient is φ = 25670008.

The previous prime is 51339943. The next prime is 51340021. The reversal of 51340018 is 81004315.

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., 33674809 + 17665209 = 5803^2 + 4203^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835003 + ... + 12835006.

Almost surely, 2^51340018 is an apocalyptic number.

51340018 is a deficient number, since it is larger than the sum of its proper divisors (25670012).

51340018 is a wasteful number, since it uses less digits than its factorization.

51340018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25670011.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 51340018 is about 7165.1949031412. The cubic root of 51340018 is about 371.6652912960.

The spelling of 51340018 in words is "fifty-one million, three hundred forty thousand, eighteen".