203022423543 has 4 divisors (see below), whose sum is σ = 270696564728. Its totient is φ = 135348282360.

The previous prime is 203022423521. The next prime is 203022423559. The reversal of 203022423543 is 345324220302.

It is a happy number.

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

It is not a de Polignac number, because 203022423543 - 2⁶ = 203022423479 is a prime.

It is a super-2 number, since 2×203022423543² (a number of 23 digits) 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 203022423543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203022421543) 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, 33837070588 + ... + 33837070593.

It is an arithmetic number, because the mean of its divisors is an integer number (67674141182).

Almost surely, 2^203022423543 is an apocalyptic number.

203022423543 is a deficient number, since it is larger than the sum of its proper divisors (67674141185).

203022423543 is an equidigital number, since it uses as much as digits as its factorization.

203022423543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67674141184.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 203022423543 its reverse (345324220302), we get a palindrome (548346643845).

The spelling of 203022423543 in words is "two hundred three billion, twenty-two million, four hundred twenty-three thousand, five hundred forty-three".