135205502531 has 8 divisors (see below), whose sum is σ = 147554761728. Its totient is φ = 122865885000.

The previous prime is 135205502479. The next prime is 135205502557.

135205502531 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135205502531 is a prime.

It is a super-2 number, since 2×135205502531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135205507531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381075 + ... + 2437196.

It is an arithmetic number, because the mean of its divisors is an integer number (18444345216).

Almost surely, 2^135205502531 is an apocalyptic number.

135205502531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135205502531 is a deficient number, since it is larger than the sum of its proper divisors (12349259197).

135205502531 is a wasteful number, since it uses less digits than its factorization.

135205502531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820833.

The product of its (nonzero) digits is 22500, while the sum is 32.

It can be divided in two parts, 135205 and 502531, that added together give a palindrome (637736).

The spelling of 135205502531 in words is "one hundred thirty-five billion, two hundred five million, five hundred two thousand, five hundred thirty-one".