2221312153 has 2 divisors, whose sum is σ = 2221312154. Its totient is φ = 2221312152.

The previous prime is 2221312091. The next prime is 2221312229. The reversal of 2221312153 is 3512131222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2212479369 + 8832784 = 47037^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221312153 - 2²⁵ = 2187757721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221310153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110656076 + 1110656077.

It is an arithmetic number, because the mean of its divisors is an integer number (1110656077).

Almost surely, 2^2221312153 is an apocalyptic number.

It is an amenable number.

2221312153 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221312153 is an equidigital number, since it uses as much as digits as its factorization.

2221312153 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 2221312153 is about 47130.7983488504. The cubic root of 2221312153 is about 1304.7777160387. Note that the first 4 decimals are identical.

Adding to 2221312153 its reverse (3512131222), we get a palindrome (5733443375).

The spelling of 2221312153 in words is "two billion, two hundred twenty-one million, three hundred twelve thousand, one hundred fifty-three".