51348391 has 2 divisors, whose sum is σ = 51348392. Its totient is φ = 51348390.

The previous prime is 51348379. The next prime is 51348403. The reversal of 51348391 is 19384315.

It is a balanced prime because it is at equal distance from previous prime (51348379) and next prime (51348403).

It is a cyclic number.

It is not a de Polignac number, because 51348391 - 2¹⁵ = 51315623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51348301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25674195 + 25674196.

It is an arithmetic number, because the mean of its divisors is an integer number (25674196).

Almost surely, 2^51348391 is an apocalyptic number.

51348391 is a deficient number, since it is larger than the sum of its proper divisors (1).

51348391 is an equidigital number, since it uses as much as digits as its factorization.

51348391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 51348391 is about 7165.7791621009. The cubic root of 51348391 is about 371.6854950567.

The spelling of 51348391 in words is "fifty-one million, three hundred forty-eight thousand, three hundred ninety-one".