135227661 has 4 divisors (see below), whose sum is σ = 180303552. Its totient is φ = 90151772.

The previous prime is 135227657. The next prime is 135227663. The reversal of 135227661 is 166722531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166722531 = 3 ⋅55574177.

It is a cyclic number.

It is not a de Polignac number, because 135227661 - 2² = 135227657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135227663) 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, 22537941 + ... + 22537946.

It is an arithmetic number, because the mean of its divisors is an integer number (45075888).

Almost surely, 2^135227661 is an apocalyptic number.

It is an amenable number.

135227661 is a deficient number, since it is larger than the sum of its proper divisors (45075891).

135227661 is an equidigital number, since it uses as much as digits as its factorization.

135227661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45075890.

The product of its digits is 15120, while the sum is 33.

The square root of 135227661 is about 11628.7428813264. The cubic root of 135227661 is about 513.2809886001.

The spelling of 135227661 in words is "one hundred thirty-five million, two hundred twenty-seven thousand, six hundred sixty-one".