51391114 has 4 divisors (see below), whose sum is σ = 77086674. Its totient is φ = 25695556.

The previous prime is 51391111. The next prime is 51391117. The reversal of 51391114 is 41119315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41119315 = 5 ⋅8223863.

It is an interprime number because it is at equal distance from previous prime (51391111) and next prime (51391117).

It can be written as a sum of positive squares in only one way, i.e., 43125489 + 8265625 = 6567^2 + 2875^2 .

It is not an unprimeable number, because it can be changed into a prime (51391111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847777 + ... + 12847780.

Almost surely, 2^51391114 is an apocalyptic number.

51391114 is a deficient number, since it is larger than the sum of its proper divisors (25695560).

51391114 is a wasteful number, since it uses less digits than its factorization.

51391114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25695559.

The product of its digits is 540, while the sum is 25.

The square root of 51391114 is about 7168.7595858698. The cubic root of 51391114 is about 371.7885500055.

The spelling of 51391114 in words is "fifty-one million, three hundred ninety-one thousand, one hundred fourteen".