1145353431 has 4 divisors (see below), whose sum is σ = 1527137912. Its totient is φ = 763568952.

The previous prime is 1145353397. The next prime is 1145353477. The reversal of 1145353431 is 1343535411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1145353431 - 2⁷ = 1145353303 is a prime.

It is a super-2 number, since 2×1145353431² = 2623668963806943522, 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 (1145357431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190892236 + ... + 190892241.

It is an arithmetic number, because the mean of its divisors is an integer number (381784478).

Almost surely, 2^1145353431 is an apocalyptic number.

1145353431 is a deficient number, since it is larger than the sum of its proper divisors (381784481).

1145353431 is an equidigital number, since it uses as much as digits as its factorization.

1145353431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381784480.

The product of its digits is 10800, while the sum is 30.

The square root of 1145353431 is about 33843.0706496913. The cubic root of 1145353431 is about 1046.2765870409.

Adding to 1145353431 its reverse (1343535411), we get a palindrome (2488888842).

The spelling of 1145353431 in words is "one billion, one hundred forty-five million, three hundred fifty-three thousand, four hundred thirty-one".