2151222013 has 2 divisors, whose sum is σ = 2151222014. Its totient is φ = 2151222012.

The previous prime is 2151221959. The next prime is 2151222037. The reversal of 2151222013 is 3102221512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1808120484 + 343101529 = 42522^2 + 18523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151222013 is a prime.

It is a super-2 number, since 2×2151222013² = 9255512298431544338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151222083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075611006 + 1075611007.

It is an arithmetic number, because the mean of its divisors is an integer number (1075611007).

Almost surely, 2^2151222013 is an apocalyptic number.

It is an amenable number.

2151222013 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151222013 is an equidigital number, since it uses as much as digits as its factorization.

2151222013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2151222013 is about 46381.2679106555. The cubic root of 2151222013 is about 1290.9073625495.

Adding to 2151222013 its reverse (3102221512), we get a palindrome (5253443525).

The spelling of 2151222013 in words is "two billion, one hundred fifty-one million, two hundred twenty-two thousand, thirteen".