1151225531 has 2 divisors, whose sum is σ = 1151225532. Its totient is φ = 1151225530.

The previous prime is 1151225527. The next prime is 1151225539. The reversal of 1151225531 is 1355221511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1151225531 - 2² = 1151225527 is a prime.

It is a super-2 number, since 2×1151225531² = 2650640446452463922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1151225531.

It is not a weakly prime, because it can be changed into another prime (1151225539) 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, 575612765 + 575612766.

It is an arithmetic number, because the mean of its divisors is an integer number (575612766).

Almost surely, 2^1151225531 is an apocalyptic number.

1151225531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151225531 is an equidigital number, since it uses as much as digits as its factorization.

1151225531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 26.

The square root of 1151225531 is about 33929.7145729227. The cubic root of 1151225531 is about 1048.0615880103.

The spelling of 1151225531 in words is "one billion, one hundred fifty-one million, two hundred twenty-five thousand, five hundred thirty-one".