135215203 has 4 divisors (see below), whose sum is σ = 135923328. Its totient is φ = 134507080.

The previous prime is 135215173. The next prime is 135215231. The reversal of 135215203 is 302512531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302512531 = 277 ⋅1092103.

It is a cyclic number.

It is not a de Polignac number, because 135215203 - 2⁹ = 135214691 is a prime.

It is a super-2 number, since 2×135215203² = 36566302244662418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135215293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353776 + ... + 354157.

It is an arithmetic number, because the mean of its divisors is an integer number (33980832).

Almost surely, 2^135215203 is an apocalyptic number.

135215203 is a deficient number, since it is larger than the sum of its proper divisors (708125).

135215203 is an equidigital number, since it uses as much as digits as its factorization.

135215203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708124.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 135215203 is about 11628.2072134960. The cubic root of 135215203 is about 513.2652259204.

Adding to 135215203 its reverse (302512531), we get a palindrome (437727734).

The spelling of 135215203 in words is "one hundred thirty-five million, two hundred fifteen thousand, two hundred three".