51035381 has 2 divisors, whose sum is σ = 51035382. Its totient is φ = 51035380.

The previous prime is 51035357. The next prime is 51035407. The reversal of 51035381 is 18353015.

It is an a-pointer prime, because the next prime (51035407) can be obtained adding 51035381 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 5134756 = 6775^2 + 2266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51035381 is a prime.

It is a super-2 number, since 2×51035381² = 5209220227630322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51035381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51035351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25517690 + 25517691.

It is an arithmetic number, because the mean of its divisors is an integer number (25517691).

Almost surely, 2^51035381 is an apocalyptic number.

It is an amenable number.

51035381 is a deficient number, since it is larger than the sum of its proper divisors (1).

51035381 is an equidigital number, since it uses as much as digits as its factorization.

51035381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51035381 is about 7143.9051645441. The cubic root of 51035381 is about 370.9287139356.

Adding to 51035381 its reverse (18353015), we get a palindrome (69388396).

The spelling of 51035381 in words is "fifty-one million, thirty-five thousand, three hundred eighty-one".