135015220 has 24 divisors (see below), whose sum is σ = 291196584. Its totient is φ = 52546176.

The previous prime is 135015217. The next prime is 135015239. The reversal of 135015220 is 22510531.

It can be written as a sum of positive squares in 4 ways, for example, as 17205904 + 117809316 = 4148^2 + 10854^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90487 + ... + 91966.

It is an arithmetic number, because the mean of its divisors is an integer number (12133191).

Almost surely, 2^135015220 is an apocalyptic number.

135015220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135015220 is an abundant number, since it is smaller than the sum of its proper divisors (156181364).

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

135015220 is a wasteful number, since it uses less digits than its factorization.

135015220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182499 (or 182497 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 135015220 is about 11619.6049846800. The cubic root of 135015220 is about 513.0120616741.

Adding to 135015220 its reverse (22510531), we get a palindrome (157525751).

It can be divided in two parts, 13501 and 5220, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 135015220 in words is "one hundred thirty-five million, fifteen thousand, two hundred twenty".