1151545431 has 4 divisors (see below), whose sum is σ = 1535393912. Its totient is φ = 767696952.

The previous prime is 1151545429. The next prime is 1151545441. The reversal of 1151545431 is 1345451511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1345451511 = 3 ⋅448483837.

It is not a de Polignac number, because 1151545431 - 2¹ = 1151545429 is a prime.

It is a super-2 number, since 2×1151545431² = 2652113759313951522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151545441) 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 in 3 ways as a sum of consecutive naturals, for example, 191924236 + ... + 191924241.

It is an arithmetic number, because the mean of its divisors is an integer number (383848478).

Almost surely, 2^1151545431 is an apocalyptic number.

1151545431 is a deficient number, since it is larger than the sum of its proper divisors (383848481).

1151545431 is an equidigital number, since it uses as much as digits as its factorization.

1151545431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383848480.

The product of its digits is 6000, while the sum is 30.

The square root of 1151545431 is about 33934.4284024352. The cubic root of 1151545431 is about 1048.1586566972.

Adding to 1151545431 its reverse (1345451511), we get a palindrome (2496996942).

The spelling of 1151545431 in words is "one billion, one hundred fifty-one million, five hundred forty-five thousand, four hundred thirty-one".