11553551 has 2 divisors, whose sum is σ = 11553552. Its totient is φ = 11553550.

The previous prime is 11553533. The next prime is 11553569. The reversal of 11553551 is 15535511.

It is a balanced prime because it is at equal distance from previous prime (11553533) and next prime (11553569).

It is a cyclic number.

It is not a de Polignac number, because 11553551 - 2¹⁸ = 11291407 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 11553551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11553511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5776775 + 5776776.

It is an arithmetic number, because the mean of its divisors is an integer number (5776776).

Almost surely, 2^11553551 is an apocalyptic number.

11553551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11553551 is an equidigital number, since it uses as much as digits as its factorization.

11553551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1875, while the sum is 26.

The square root of 11553551 is about 3399.0514853412. The cubic root of 11553551 is about 226.0676892814.

The spelling of 11553551 in words is "eleven million, five hundred fifty-three thousand, five hundred fifty-one".