53651321 has 2 divisors, whose sum is σ = 53651322. Its totient is φ = 53651320.

The previous prime is 53651309. The next prime is 53651333. The reversal of 53651321 is 12315635.

It is a balanced prime because it is at equal distance from previous prime (53651309) and next prime (53651333).

It can be written as a sum of positive squares in only one way, i.e., 41783296 + 11868025 = 6464^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 53651321 - 2¹⁰ = 53650297 is a prime.

It is a Chen prime.

It is equal to p_3206582 and since 53651321 and 3206582 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (53651021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26825660 + 26825661.

It is an arithmetic number, because the mean of its divisors is an integer number (26825661).

Almost surely, 2^53651321 is an apocalyptic number.

It is an amenable number.

53651321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53651321 is an equidigital number, since it uses as much as digits as its factorization.

53651321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 53651321 is about 7324.7062057123. The cubic root of 53651321 is about 377.1610243050.

Adding to 53651321 its reverse (12315635), we get a palindrome (65966956).

The spelling of 53651321 in words is "fifty-three million, six hundred fifty-one thousand, three hundred twenty-one".