13551500515531 has 16 divisors (see below), whose sum is σ = 14930423324928. Its totient is φ = 12197082172000.

The previous prime is 13551500515529. The next prime is 13551500515537.

13551500515531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13551500515531 - 2¹ = 13551500515529 is a prime.

It is a super-2 number, since 2×13551500515531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13551500515537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29125140 + ... + 29586766.

It is an arithmetic number, because the mean of its divisors is an integer number (933151457808).

Almost surely, 2^{13551500515531} is an apocalyptic number.

13551500515531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13551500515531 is a deficient number, since it is larger than the sum of its proper divisors (1378922809397).

13551500515531 is a wasteful number, since it uses less digits than its factorization.

13551500515531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488162.

The product of its (nonzero) digits is 140625, while the sum is 40.

The spelling of 13551500515531 in words is "thirteen trillion, five hundred fifty-one billion, five hundred million, five hundred fifteen thousand, five hundred thirty-one".