51761233 has 2 divisors, whose sum is σ = 51761234. Its totient is φ = 51761232.

The previous prime is 51761197. The next prime is 51761239. The reversal of 51761233 is 33216715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50936769 + 824464 = 7137^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 51761233 - 2¹³ = 51753041 is a prime.

It is not a weakly prime, because it can be changed into another prime (51761239) 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, 25880616 + 25880617.

It is an arithmetic number, because the mean of its divisors is an integer number (25880617).

Almost surely, 2^51761233 is an apocalyptic number.

It is an amenable number.

51761233 is a deficient number, since it is larger than the sum of its proper divisors (1).

51761233 is an equidigital number, since it uses as much as digits as its factorization.

51761233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 51761233 is about 7194.5279900769. The cubic root of 51761233 is about 372.6789566975.

Adding to 51761233 its reverse (33216715), we get a palindrome (84977948).

It can be divided in two parts, 51 and 761233, that multiplied together give a palindrome (38822883).

The spelling of 51761233 in words is "fifty-one million, seven hundred sixty-one thousand, two hundred thirty-three".