53531551 has 2 divisors, whose sum is σ = 53531552. Its totient is φ = 53531550.

The previous prime is 53531539. The next prime is 53531579. The reversal of 53531551 is 15513535.

It is an a-pointer prime, because the next prime (53531579) can be obtained adding 53531551 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53531551 - 2¹¹ = 53529503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53531501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26765775 + 26765776.

It is an arithmetic number, because the mean of its divisors is an integer number (26765776).

Almost surely, 2^53531551 is an apocalyptic number.

53531551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53531551 is an equidigital number, since it uses as much as digits as its factorization.

53531551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5625, while the sum is 28.

The square root of 53531551 is about 7316.5258832317. The cubic root of 53531551 is about 376.8801599456.

The spelling of 53531551 in words is "fifty-three million, five hundred thirty-one thousand, five hundred fifty-one".