1545543223 has 8 divisors (see below), whose sum is σ = 1823313920. Its totient is φ = 1282017240.

The previous prime is 1545543221. The next prime is 1545543227. The reversal of 1545543223 is 3223455451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1545543223 - 2¹ = 1545543221 is a prime.

It is a super-2 number, since 2×1545543223² = 4777407708322455458, 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 (1545543221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3560943 + ... + 3561376.

It is an arithmetic number, because the mean of its divisors is an integer number (227914240).

Almost surely, 2^1545543223 is an apocalyptic number.

1545543223 is a deficient number, since it is larger than the sum of its proper divisors (277770697).

1545543223 is an equidigital number, since it uses as much as digits as its factorization.

1545543223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122357.

The product of its digits is 72000, while the sum is 34.

The square root of 1545543223 is about 39313.3975000889. The cubic root of 1545543223 is about 1156.1842573655.

Adding to 1545543223 its reverse (3223455451), we get a palindrome (4768998674).

The spelling of 1545543223 in words is "one billion, five hundred forty-five million, five hundred forty-three thousand, two hundred twenty-three".