1330221157 has 2 divisors, whose sum is σ = 1330221158. Its totient is φ = 1330221156.

The previous prime is 1330221127. The next prime is 1330221173. The reversal of 1330221157 is 7511220331.

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., 908781316 + 421439841 = 30146^2 + 20529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330221157 - 2¹⁵ = 1330188389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665110578 + 665110579.

It is an arithmetic number, because the mean of its divisors is an integer number (665110579).

Almost surely, 2^1330221157 is an apocalyptic number.

It is an amenable number.

1330221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330221157 is an equidigital number, since it uses as much as digits as its factorization.

1330221157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1330221157 is about 36472.1970410339. The cubic root of 1330221157 is about 1099.7854008363.

Adding to 1330221157 its reverse (7511220331), we get a palindrome (8841441488).

The spelling of 1330221157 in words is "one billion, three hundred thirty million, two hundred twenty-one thousand, one hundred fifty-seven".