1021552229 has 2 divisors, whose sum is σ = 1021552230. Its totient is φ = 1021552228.

The previous prime is 1021552201. The next prime is 1021552267. The reversal of 1021552229 is 9222551201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774119329 + 247432900 = 27823^2 + 15730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021552229 - 2¹⁶ = 1021486693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021551229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510776114 + 510776115.

It is an arithmetic number, because the mean of its divisors is an integer number (510776115).

Almost surely, 2^1021552229 is an apocalyptic number.

It is an amenable number.

1021552229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021552229 is an equidigital number, since it uses as much as digits as its factorization.

1021552229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1021552229 is about 31961.7306946917. The cubic root of 1021552229 is about 1007.1330746013.

The spelling of 1021552229 in words is "one billion, twenty-one million, five hundred fifty-two thousand, two hundred twenty-nine".