53403551 has 2 divisors, whose sum is σ = 53403552. Its totient is φ = 53403550.

The previous prime is 53403533. The next prime is 53403557. The reversal of 53403551 is 15530435.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53403551 - 2²² = 49209247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53403551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53403557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26701775 + 26701776.

It is an arithmetic number, because the mean of its divisors is an integer number (26701776).

Almost surely, 2^53403551 is an apocalyptic number.

53403551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53403551 is an equidigital number, since it uses as much as digits as its factorization.

53403551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 53403551 is about 7307.7733270812. The cubic root of 53403551 is about 376.5795324940.

Adding to 53403551 its reverse (15530435), we get a palindrome (68933986).

The spelling of 53403551 in words is "fifty-three million, four hundred three thousand, five hundred fifty-one".