135150221 has 8 divisors (see below), whose sum is σ = 144518904. Its totient is φ = 125939200.

The previous prime is 135150203. The next prime is 135150251. The reversal of 135150221 is 122051531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86304100 + 48846121 = 9290^2 + 6989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135150221 - 2⁶ = 135150157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135150193 and 135150202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135150251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37640 + ... + 41073.

It is an arithmetic number, because the mean of its divisors is an integer number (18064863).

Almost surely, 2^135150221 is an apocalyptic number.

It is an amenable number.

135150221 is a deficient number, since it is larger than the sum of its proper divisors (9368683).

135150221 is a wasteful number, since it uses less digits than its factorization.

135150221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78831.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 135150221 is about 11625.4127238563. The cubic root of 135150221 is about 513.1829907265.

The spelling of 135150221 in words is "one hundred thirty-five million, one hundred fifty thousand, two hundred twenty-one".