135531210 has 32 divisors (see below), whose sum is σ = 336493440. Its totient is φ = 34895168.

The previous prime is 135531197. The next prime is 135531217. The reversal of 135531210 is 12135531.

It is not an unprimeable number, because it can be changed into a prime (135531217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77022 + ... + 78761.

It is an arithmetic number, because the mean of its divisors is an integer number (10515420).

Almost surely, 2^135531210 is an apocalyptic number.

135531210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135531210 is an abundant number, since it is smaller than the sum of its proper divisors (200962230).

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

135531210 is a wasteful number, since it uses less digits than its factorization.

135531210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155822.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 135531210 is about 11641.7872339259. The cubic root of 135531210 is about 513.6647599240.

Adding to 135531210 its reverse (12135531), we get a palindrome (147666741).

The spelling of 135531210 in words is "one hundred thirty-five million, five hundred thirty-one thousand, two hundred ten".