203445253430 has 16 divisors (see below), whose sum is σ = 367733684160. Its totient is φ = 81037606272.

The previous prime is 203445253421. The next prime is 203445253439. The reversal of 203445253430 is 34352544302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (203445253421) and next prime (203445253439).

It is a super-2 number, since 2×203445253430² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203445253439) 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, 42559379 + ... + 42564158.

It is an arithmetic number, because the mean of its divisors is an integer number (22983355260).

Almost surely, 2^203445253430 is an apocalyptic number.

203445253430 is a deficient number, since it is larger than the sum of its proper divisors (164288430730).

203445253430 is a wasteful number, since it uses less digits than its factorization.

203445253430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85123783.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 203445253430 its reverse (34352544302), we get a palindrome (237797797732).

The spelling of 203445253430 in words is "two hundred three billion, four hundred forty-five million, two hundred fifty-three thousand, four hundred thirty".