1145445331 has 4 divisors (see below), whose sum is σ = 1173383064. Its totient is φ = 1117507600.

The previous prime is 1145445313. The next prime is 1145445337. The reversal of 1145445331 is 1335445411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145445331 - 2¹⁵ = 1145412563 is a prime.

It is a super-2 number, since 2×1145445331² = 2624090012619399122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145445293 and 1145445302.

It is not an unprimeable number, because it can be changed into a prime (1145445337) 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, 13968805 + ... + 13968886.

It is an arithmetic number, because the mean of its divisors is an integer number (293345766).

Almost surely, 2^1145445331 is an apocalyptic number.

1145445331 is a deficient number, since it is larger than the sum of its proper divisors (27937733).

1145445331 is an equidigital number, since it uses as much as digits as its factorization.

1145445331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27937732.

The product of its digits is 14400, while the sum is 31.

The square root of 1145445331 is about 33844.4283597759. The cubic root of 1145445331 is about 1046.3045697416.

It can be divided in two parts, 114 and 5445331, that added together give a palindrome (5445445).

The spelling of 1145445331 in words is "one billion, one hundred forty-five million, four hundred forty-five thousand, three hundred thirty-one".