134153221 has 2 divisors, whose sum is σ = 134153222. Its totient is φ = 134153220.

The previous prime is 134153207. The next prime is 134153233. The reversal of 134153221 is 122351431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97792321 + 36360900 = 9889^2 + 6030^2 .

It is a cyclic number.

It is not a de Polignac number, because 134153221 - 2⁷ = 134153093 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 134153192 and 134153201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134153251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67076610 + 67076611.

It is an arithmetic number, because the mean of its divisors is an integer number (67076611).

Almost surely, 2^134153221 is an apocalyptic number.

It is an amenable number.

134153221 is a deficient number, since it is larger than the sum of its proper divisors (1).

134153221 is an equidigital number, since it uses as much as digits as its factorization.

134153221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 134153221 is about 11582.4531512111. The cubic root of 134153221 is about 511.9179619635.

The spelling of 134153221 in words is "one hundred thirty-four million, one hundred fifty-three thousand, two hundred twenty-one".