1153221031 has 2 divisors, whose sum is σ = 1153221032. Its totient is φ = 1153221030.

The previous prime is 1153221019. The next prime is 1153221067. The reversal of 1153221031 is 1301223511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1153221031 - 2¹³ = 1153212839 is a prime.

It is a super-2 number, since 2×1153221031² = 2659837492681405922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153221431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576610515 + 576610516.

It is an arithmetic number, because the mean of its divisors is an integer number (576610516).

Almost surely, 2^1153221031 is an apocalyptic number.

1153221031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153221031 is an equidigital number, since it uses as much as digits as its factorization.

1153221031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1153221031 is about 33959.1082185619. The cubic root of 1153221031 is about 1048.6667980266. Note that the first 3 decimals are identical.

Adding to 1153221031 its reverse (1301223511), we get a palindrome (2454444542).

The spelling of 1153221031 in words is "one billion, one hundred fifty-three million, two hundred twenty-one thousand, thirty-one".