135231948 has 18 divisors (see below), whose sum is σ = 341836404. Its totient is φ = 45077304.

The previous prime is 135231931. The next prime is 135231961. The reversal of 135231948 is 849132531.

135231948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3756443 = 135231948 / (1 + 3 + 5 + 2 + 3 + 1 + 9 + 4 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1878186 + ... + 1878257.

Almost surely, 2^135231948 is an apocalyptic number.

135231948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135231948 is an abundant number, since it is smaller than the sum of its proper divisors (206604456).

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

135231948 is a wasteful number, since it uses less digits than its factorization.

135231948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756453 (or 3756448 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 135231948 is about 11628.9272076146. The cubic root of 135231948 is about 513.2864125701.

The spelling of 135231948 in words is "one hundred thirty-five million, two hundred thirty-one thousand, nine hundred forty-eight".