135423135252 has 48 divisors (see below), whose sum is σ = 351245018880. Its totient is φ = 45122016384.

The previous prime is 135423135251. The next prime is 135423135257. The reversal of 135423135252 is 252531324531.

135423135252 is a `hidden beast` number, since 1 + 3 + 542 + 3 + 13 + 52 + 52 = 666.

It is a super-3 number, since 3×135423135252³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135423135251) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5733 + ... + 520460.

It is an arithmetic number, because the mean of its divisors is an integer number (7317604560).

Almost surely, 2^135423135252 is an apocalyptic number.

135423135252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135423135252 is an abundant number, since it is smaller than the sum of its proper divisors (215821883628).

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

135423135252 is a wasteful number, since it uses less digits than its factorization.

135423135252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528589 (or 528581 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 135423135252 its reverse (252531324531), we get a palindrome (387954459783).

The spelling of 135423135252 in words is "one hundred thirty-five billion, four hundred twenty-three million, one hundred thirty-five thousand, two hundred fifty-two".