1151511005 has 8 divisors (see below), whose sum is σ = 1390615512. Its totient is φ = 915340608.

The previous prime is 1151511001. The next prime is 1151511007. The reversal of 1151511005 is 5001151511.

It can be written as a sum of positive squares in 4 ways, for example, as 2775556 + 1148735449 = 1666^2 + 33893^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1151511005 - 2² = 1151511001 is a prime.

It is a super-3 number, since 3×1151511005³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151511001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732662 + ... + 734231.

It is an arithmetic number, because the mean of its divisors is an integer number (173826939).

Almost surely, 2^1151511005 is an apocalyptic number.

It is an amenable number.

1151511005 is a deficient number, since it is larger than the sum of its proper divisors (239104507).

1151511005 is a wasteful number, since it uses less digits than its factorization.

1151511005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467055.

The product of its (nonzero) digits is 125, while the sum is 20.

The square root of 1151511005 is about 33933.9211556814. The cubic root of 1151511005 is about 1048.1482115254.

Adding to 1151511005 its reverse (5001151511), we get a palindrome (6152662516).

The spelling of 1151511005 in words is "one billion, one hundred fifty-one million, five hundred eleven thousand, five".