203440423552 has 16 divisors (see below), whose sum is σ = 405291469050. Its totient is φ = 101720211712.

The previous prime is 203440423531. The next prime is 203440423559. The reversal of 203440423552 is 255324044302.

It can be written as a sum of positive squares in only one way, i.e., 156670305856 + 46770117696 = 395816^2 + 216264^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (203440423559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 794689027 + ... + 794689282.

Almost surely, 2^203440423552 is an apocalyptic number.

It is an amenable number.

203440423552 is a deficient number, since it is larger than the sum of its proper divisors (201851045498).

203440423552 is an equidigital number, since it uses as much as digits as its factorization.

203440423552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589378323 (or 1589378311 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 203440423552 its reverse (255324044302), we get a palindrome (458764467854).

The spelling of 203440423552 in words is "two hundred three billion, four hundred forty million, four hundred twenty-three thousand, five hundred fifty-two".