51397051 has 2 divisors, whose sum is σ = 51397052. Its totient is φ = 51397050.

The previous prime is 51397013. The next prime is 51397061. The reversal of 51397051 is 15079315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51397051 - 2⁷ = 51396923 is a prime.

It is not a weakly prime, because it can be changed into another prime (51397061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25698525 + 25698526.

It is an arithmetic number, because the mean of its divisors is an integer number (25698526).

Almost surely, 2^51397051 is an apocalyptic number.

51397051 is a deficient number, since it is larger than the sum of its proper divisors (1).

51397051 is an equidigital number, since it uses as much as digits as its factorization.

51397051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 51397051 is about 7169.1736622849. The cubic root of 51397051 is about 371.8028665118.

The spelling of 51397051 in words is "fifty-one million, three hundred ninety-seven thousand, fifty-one".