135220355 has 4 divisors (see below), whose sum is σ = 162264432. Its totient is φ = 108176280.

The previous prime is 135220343. The next prime is 135220367. The reversal of 135220355 is 553022531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (135220343) and next prime (135220367).

It is not a de Polignac number, because 135220355 - 2⁴ = 135220339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13522031 + ... + 13522040.

It is an arithmetic number, because the mean of its divisors is an integer number (40566108).

Almost surely, 2^135220355 is an apocalyptic number.

135220355 is a deficient number, since it is larger than the sum of its proper divisors (27044077).

135220355 is an equidigital number, since it uses as much as digits as its factorization.

135220355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27044076.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 135220355 is about 11628.4287416658. The cubic root of 135220355 is about 513.2717446865.

Adding to 135220355 its reverse (553022531), we get a palindrome (688242886).

The spelling of 135220355 in words is "one hundred thirty-five million, two hundred twenty thousand, three hundred fifty-five".