135213250 has 64 divisors (see below), whose sum is σ = 262828800. Its totient is φ = 52060800.

The previous prime is 135213241. The next prime is 135213259. The reversal of 135213250 is 52312531.

It is an interprime number because it is at equal distance from previous prime (135213241) and next prime (135213259).

It is not an unprimeable number, because it can be changed into a prime (135213259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1312699 + ... + 1312801.

It is an arithmetic number, because the mean of its divisors is an integer number (4106700).

Almost surely, 2^135213250 is an apocalyptic number.

135213250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135213250 is a deficient number, since it is larger than the sum of its proper divisors (127615550).

135213250 is a wasteful number, since it uses less digits than its factorization.

135213250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 258 counting only the distinct ones).

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

The square root of 135213250 is about 11628.1232363611. The cubic root of 135213250 is about 513.2627547687.

Adding to 135213250 its reverse (52312531), we get a palindrome (187525781).

The spelling of 135213250 in words is "one hundred thirty-five million, two hundred thirteen thousand, two hundred fifty".