152040221 has 2 divisors, whose sum is σ = 152040222. Its totient is φ = 152040220.

The previous prime is 152040191. The next prime is 152040241. The reversal of 152040221 is 122040251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140683321 + 11356900 = 11861^2 + 3370^2 .

It is an emirp because it is prime and its reverse (122040251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152040221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 152040221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152040241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76020110 + 76020111.

It is an arithmetic number, because the mean of its divisors is an integer number (76020111).

Almost surely, 2^152040221 is an apocalyptic number.

It is an amenable number.

152040221 is a deficient number, since it is larger than the sum of its proper divisors (1).

152040221 is an equidigital number, since it uses as much as digits as its factorization.

152040221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 152040221 is about 12330.4590749899. The cubic root of 152040221 is about 533.7273983047.

Adding to 152040221 its reverse (122040251), we get a palindrome (274080472).

The spelling of 152040221 in words is "one hundred fifty-two million, forty thousand, two hundred twenty-one".