1151521511 has 12 divisors (see below), whose sum is σ = 1375730568. Its totient is φ = 960340752.

The previous prime is 1151521507. The next prime is 1151521529. The reversal of 1151521511 is 1151251511.

It is not a de Polignac number, because 1151521511 - 2² = 1151521507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151521561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315761 + ... + 319386.

It is an arithmetic number, because the mean of its divisors is an integer number (114644214).

Almost surely, 2^1151521511 is an apocalyptic number.

1151521511 is a deficient number, since it is larger than the sum of its proper divisors (224209057).

1151521511 is an equidigital number, since it uses as much as digits as its factorization.

1151521511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635198 (or 635191 counting only the distinct ones).

The product of its digits is 250, while the sum is 23.

The square root of 1151521511 is about 33934.0759561830. The cubic root of 1151521511 is about 1048.1513991666.

The spelling of 1151521511 in words is "one billion, one hundred fifty-one million, five hundred twenty-one thousand, five hundred eleven".