1151121553 has 2 divisors, whose sum is σ = 1151121554. Its totient is φ = 1151121552.

The previous prime is 1151121547. The next prime is 1151121571. The reversal of 1151121553 is 3551211511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999634689 + 151486864 = 31617^2 + 12308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151121553 is a prime.

It is a super-2 number, since 2×1151121553² = 2650161659562263618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1151121533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575560776 + 575560777.

It is an arithmetic number, because the mean of its divisors is an integer number (575560777).

Almost surely, 2^1151121553 is an apocalyptic number.

It is an amenable number.

1151121553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151121553 is an equidigital number, since it uses as much as digits as its factorization.

1151121553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 25.

The square root of 1151121553 is about 33928.1822825804. The cubic root of 1151121553 is about 1048.0300336288.

The spelling of 1151121553 in words is "one billion, one hundred fifty-one million, one hundred twenty-one thousand, five hundred fifty-three".