51626261 has 2 divisors, whose sum is σ = 51626262. Its totient is φ = 51626260.

The previous prime is 51626233. The next prime is 51626269. The reversal of 51626261 is 16262615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46648900 + 4977361 = 6830^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 51626261 - 2¹⁰ = 51625237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51626269) 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, 25813130 + 25813131.

It is an arithmetic number, because the mean of its divisors is an integer number (25813131).

Almost surely, 2^51626261 is an apocalyptic number.

It is an amenable number.

51626261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51626261 is an equidigital number, since it uses as much as digits as its factorization.

51626261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 51626261 is about 7185.1416826671. The cubic root of 51626261 is about 372.3547435988.

Adding to 51626261 its reverse (16262615), we get a palindrome (67888876).

The spelling of 51626261 in words is "fifty-one million, six hundred twenty-six thousand, two hundred sixty-one".