1155321229 has 2 divisors, whose sum is σ = 1155321230. Its totient is φ = 1155321228.

The previous prime is 1155321221. The next prime is 1155321269. The reversal of 1155321229 is 9221235511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992376004 + 162945225 = 31502^2 + 12765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155321229 - 2³ = 1155321221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155321229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155321221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577660614 + 577660615.

It is an arithmetic number, because the mean of its divisors is an integer number (577660615).

Almost surely, 2^1155321229 is an apocalyptic number.

It is an amenable number.

1155321229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155321229 is an equidigital number, since it uses as much as digits as its factorization.

1155321229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 1155321229 is about 33990.0166078218. The cubic root of 1155321229 is about 1049.3030080349.

The spelling of 1155321229 in words is "one billion, one hundred fifty-five million, three hundred twenty-one thousand, two hundred twenty-nine".