135521366 has 4 divisors (see below), whose sum is σ = 203282052. Its totient is φ = 67760682.

The previous prime is 135521363. The next prime is 135521377. The reversal of 135521366 is 663125531.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135521363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33880340 + ... + 33880343.

It is an arithmetic number, because the mean of its divisors is an integer number (50820513).

Almost surely, 2^135521366 is an apocalyptic number.

135521366 is a deficient number, since it is larger than the sum of its proper divisors (67760686).

135521366 is an equidigital number, since it uses as much as digits as its factorization.

135521366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67760685.

The product of its digits is 16200, while the sum is 32.

The square root of 135521366 is about 11641.3644389307. The cubic root of 135521366 is about 513.6523233338.

Adding to 135521366 its reverse (663125531), we get a palindrome (798646897).

The spelling of 135521366 in words is "one hundred thirty-five million, five hundred twenty-one thousand, three hundred sixty-six".