13551213555 has 96 divisors (see below), whose sum is σ = 26510964480. Its totient is φ = 6345527040.

The previous prime is 13551213547. The next prime is 13551213569. The reversal of 13551213555 is 55531215531.

13551213555 is a `hidden beast` number, since 1 + 3 + 5 + 512 + 135 + 5 + 5 = 666.

It is not a de Polignac number, because 13551213555 - 2³ = 13551213547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2543124 + ... + 2548446.

It is an arithmetic number, because the mean of its divisors is an integer number (276155880).

Almost surely, 2^13551213555 is an apocalyptic number.

13551213555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13551213555 is a deficient number, since it is larger than the sum of its proper divisors (12959750925).

13551213555 is a wasteful number, since it uses less digits than its factorization.

13551213555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521 (or 5518 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 13551213555 in words is "thirteen billion, five hundred fifty-one million, two hundred thirteen thousand, five hundred fifty-five".