51620341 has 2 divisors, whose sum is σ = 51620342. Its totient is φ = 51620340.

The previous prime is 51620323. The next prime is 51620369. The reversal of 51620341 is 14302615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 555025 = 7146^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 51620341 - 2¹³ = 51612149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51620311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25810170 + 25810171.

It is an arithmetic number, because the mean of its divisors is an integer number (25810171).

Almost surely, 2^51620341 is an apocalyptic number.

It is an amenable number.

51620341 is a deficient number, since it is larger than the sum of its proper divisors (1).

51620341 is an equidigital number, since it uses as much as digits as its factorization.

51620341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51620341 is about 7184.7297095994. The cubic root of 51620341 is about 372.3405103753.

Adding to 51620341 its reverse (14302615), we get a palindrome (65922956).

The spelling of 51620341 in words is "fifty-one million, six hundred twenty thousand, three hundred forty-one".