1052154221 has 2 divisors, whose sum is σ = 1052154222. Its totient is φ = 1052154220.

The previous prime is 1052154217. The next prime is 1052154223. The reversal of 1052154221 is 1224512501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876988996 + 175165225 = 29614^2 + 13235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052154221 - 2² = 1052154217 is a prime.

It is a super-2 number, since 2×1052154221² = 2214057009536233682, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1052154223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1052154223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526077110 + 526077111.

It is an arithmetic number, because the mean of its divisors is an integer number (526077111).

Almost surely, 2^1052154221 is an apocalyptic number.

It is an amenable number.

1052154221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1052154221 is an equidigital number, since it uses as much as digits as its factorization.

1052154221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1052154221 is about 32436.9268118914. The cubic root of 1052154221 is about 1017.0909748139.

Adding to 1052154221 its reverse (1224512501), we get a palindrome (2276666722).

The spelling of 1052154221 in words is "one billion, fifty-two million, one hundred fifty-four thousand, two hundred twenty-one".