135231048 has 24 divisors (see below), whose sum is σ = 366250950. Its totient is φ = 45076992.

The previous prime is 135231013. The next prime is 135231049. The reversal of 135231048 is 840132531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 126832644 + 8398404 = 11262^2 + 2898^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (135231049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 939033 + ... + 939176.

Almost surely, 2^135231048 is an apocalyptic number.

135231048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135231048 is an abundant number, since it is smaller than the sum of its proper divisors (231019902).

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

135231048 is a wasteful number, since it uses less digits than its factorization.

135231048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878221 (or 1878214 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 135231048 is about 11628.8885109455. Note that the first 3 decimals coincide. The cubic root of 135231048 is about 513.2852738875.

Adding to 135231048 its reverse (840132531), we get a palindrome (975363579).

It can be divided in two parts, 1352 and 31048, that added together give a square (32400 = 180²).

The spelling of 135231048 in words is "one hundred thirty-five million, two hundred thirty-one thousand, forty-eight".