1145313631 has 16 divisors (see below), whose sum is σ = 1473988608. Its totient is φ = 863661600.

The previous prime is 1145313607. The next prime is 1145313667. The reversal of 1145313631 is 1363135411.

It is a cyclic number.

It is not a de Polignac number, because 1145313631 - 2⁵ = 1145313599 is a prime.

It is a super-2 number, since 2×1145313631² = 2623486626708808322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145313631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145313601) 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 15 ways as a sum of consecutive naturals, for example, 237520 + ... + 242293.

It is an arithmetic number, because the mean of its divisors is an integer number (92124288).

Almost surely, 2^1145313631 is an apocalyptic number.

1145313631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1145313631 is a deficient number, since it is larger than the sum of its proper divisors (328674977).

1145313631 is a wasteful number, since it uses less digits than its factorization.

1145313631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479862.

The product of its digits is 3240, while the sum is 28.

The square root of 1145313631 is about 33842.4826364733. The cubic root of 1145313631 is about 1046.2644678442.

The spelling of 1145313631 in words is "one billion, one hundred forty-five million, three hundred thirteen thousand, six hundred thirty-one".