51025399 has 2 divisors, whose sum is σ = 51025400. Its totient is φ = 51025398.

The previous prime is 51025367. The next prime is 51025423. The reversal of 51025399 is 99352015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51025399 - 2⁵ = 51025367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51025319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512699 + 25512700.

It is an arithmetic number, because the mean of its divisors is an integer number (25512700).

Almost surely, 2^51025399 is an apocalyptic number.

51025399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025399 is an equidigital number, since it uses as much as digits as its factorization.

51025399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 51025399 is about 7143.2064928854. The cubic root of 51025399 is about 370.9045290677.

It can be divided in two parts, 5102 and 5399, that added together give a palindrome (10501).

The spelling of 51025399 in words is "fifty-one million, twenty-five thousand, three hundred ninety-nine".