136813220 has 12 divisors (see below), whose sum is σ = 287307804. Its totient is φ = 54725280.

The previous prime is 136813219. The next prime is 136813231. The reversal of 136813220 is 22318631.

It can be written as a sum of positive squares in 2 ways, for example, as 102050404 + 34762816 = 10102^2 + 5896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 136813220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3420311 + ... + 3420350.

It is an arithmetic number, because the mean of its divisors is an integer number (23942317).

Almost surely, 2^136813220 is an apocalyptic number.

136813220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136813220 is an abundant number, since it is smaller than the sum of its proper divisors (150494584).

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

136813220 is a wasteful number, since it uses less digits than its factorization.

136813220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840670 (or 6840668 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 136813220 is about 11696.7183431935. The cubic root of 136813220 is about 515.2792904934.

The spelling of 136813220 in words is "one hundred thirty-six million, eight hundred thirteen thousand, two hundred twenty".