13551133550 has 24 divisors (see below), whose sum is σ = 25256488392. Its totient is φ = 5409404000.

The previous prime is 13551133549. The next prime is 13551133559. The reversal of 13551133550 is 5533115531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13551133559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251441 + ... + 300540.

It is an arithmetic number, because the mean of its divisors is an integer number (1052353683).

Almost surely, 2^13551133550 is an apocalyptic number.

13551133550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13551133550 is a deficient number, since it is larger than the sum of its proper divisors (11705354842).

13551133550 is a wasteful number, since it uses less digits than its factorization.

13551133550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552484 (or 552479 counting only the distinct ones).

The product of its (nonzero) digits is 16875, while the sum is 32.

The spelling of 13551133550 in words is "thirteen billion, five hundred fifty-one million, one hundred thirty-three thousand, five hundred fifty".