51333389 has 2 divisors, whose sum is σ = 51333390. Its totient is φ = 51333388.

The previous prime is 51333377. The next prime is 51333397. The reversal of 51333389 is 98333315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 11957764 = 6275^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 51333389 - 2⁸ = 51333133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51333329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25666694 + 25666695.

It is an arithmetic number, because the mean of its divisors is an integer number (25666695).

Almost surely, 2^51333389 is an apocalyptic number.

It is an amenable number.

51333389 is a deficient number, since it is larger than the sum of its proper divisors (1).

51333389 is an equidigital number, since it uses as much as digits as its factorization.

51333389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 35.

The square root of 51333389 is about 7164.7323048388. The cubic root of 51333389 is about 371.6492941891.

The spelling of 51333389 in words is "fifty-one million, three hundred thirty-three thousand, three hundred eighty-nine".