53551439 has 2 divisors, whose sum is σ = 53551440. Its totient is φ = 53551438.

The previous prime is 53551417. The next prime is 53551441. The reversal of 53551439 is 93415535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53551439 - 2¹² = 53547343 is a prime.

Together with 53551441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53551399 and 53551408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53551489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26775719 + 26775720.

It is an arithmetic number, because the mean of its divisors is an integer number (26775720).

Almost surely, 2^53551439 is an apocalyptic number.

53551439 is a deficient number, since it is larger than the sum of its proper divisors (1).

53551439 is an equidigital number, since it uses as much as digits as its factorization.

53551439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 35.

The square root of 53551439 is about 7317.8848720105. The cubic root of 53551439 is about 376.9268269077.

The spelling of 53551439 in words is "fifty-three million, five hundred fifty-one thousand, four hundred thirty-nine".