13531202145 has 32 divisors (see below), whose sum is σ = 24061040640.
Its totient is φ = 7214970240.
The previous prime is 13531202143. The next prime is 13531202171. The reversal of 13531202145 is 54120213531.
13531202145 is a `hidden beast` number, since 135 + 312 + 0 + 214 + 5 = 666.
It is not a de Polignac number, because 13531202145 - 21 = 13531202143 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (13531202141) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765760 + ... + 783230.
It is an arithmetic number, because the mean of its divisors is an integer number (751907520).
Almost surely, 213531202145 is an apocalyptic number.
13531202145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
13531202145 is a deficient number, since it is larger than the sum of its proper divisors (10529838495).
13531202145 is a wasteful number, since it uses less digits than its factorization.
13531202145 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 23222 (or 23216 counting only the distinct ones).
The product of its (nonzero) digits is 3600, while the sum is 27.
The spelling of 13531202145 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, one hundred forty-five".