153113221 has 2 divisors, whose sum is σ = 153113222. Its totient is φ = 153113220.

The previous prime is 153113179. The next prime is 153113249. The reversal of 153113221 is 122311351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141348321 + 11764900 = 11889^2 + 3430^2 .

It is an emirp because it is prime and its reverse (122311351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153113221 - 2¹¹ = 153111173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153113021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76556610 + 76556611.

It is an arithmetic number, because the mean of its divisors is an integer number (76556611).

Almost surely, 2^153113221 is an apocalyptic number.

It is an amenable number.

153113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

153113221 is an equidigital number, since it uses as much as digits as its factorization.

153113221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 153113221 is about 12373.8927181385. The cubic root of 153113221 is about 534.9800219634.

Adding to 153113221 its reverse (122311351), we get a palindrome (275424572).

The spelling of 153113221 in words is "one hundred fifty-three million, one hundred thirteen thousand, two hundred twenty-one".