135531131420 has 12 divisors (see below), whose sum is σ = 284615376024. Its totient is φ = 54212452560.

The previous prime is 135531131353. The next prime is 135531131471. The reversal of 135531131420 is 24131135531.

It is a super-2 number, since 2×135531131420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3388278266 + ... + 3388278305.

It is an arithmetic number, because the mean of its divisors is an integer number (23717948002).

Almost surely, 2^135531131420 is an apocalyptic number.

135531131420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135531131420 is an abundant number, since it is smaller than the sum of its proper divisors (149084244604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135531131420 is a wasteful number, since it uses less digits than its factorization.

135531131420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776556580 (or 6776556578 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 135531131420 its reverse (24131135531), we get a palindrome (159662266951).

The spelling of 135531131420 in words is "one hundred thirty-five billion, five hundred thirty-one million, one hundred thirty-one thousand, four hundred twenty".