53107421 has 2 divisors, whose sum is σ = 53107422. Its totient is φ = 53107420.

The previous prime is 53107399. The next prime is 53107441. The reversal of 53107421 is 12470135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 9084196 = 6635^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 53107421 - 2¹⁴ = 53091037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53107441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26553710 + 26553711.

It is an arithmetic number, because the mean of its divisors is an integer number (26553711).

Almost surely, 2^53107421 is an apocalyptic number.

It is an amenable number.

53107421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53107421 is an equidigital number, since it uses as much as digits as its factorization.

53107421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 53107421 is about 7287.4838593303. The cubic root of 53107421 is about 375.8821802458.

Adding to 53107421 its reverse (12470135), we get a palindrome (65577556).

The spelling of 53107421 in words is "fifty-three million, one hundred seven thousand, four hundred twenty-one".