203012345 has 16 divisors (see below), whose sum is σ = 247891008. Its totient is φ = 159572160.

The previous prime is 203012311. The next prime is 203012347. The reversal of 203012345 is 543210302.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-203012345 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203012347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231047 + ... + 231923.

It is an arithmetic number, because the mean of its divisors is an integer number (15493188).

Almost surely, 2^203012345 is an apocalyptic number.

It is an amenable number.

203012345 is a deficient number, since it is larger than the sum of its proper divisors (44878663).

203012345 is an equidigital number, since it uses as much as digits as its factorization.

203012345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 203012345 is about 14248.2400667591. The cubic root of 203012345 is about 587.7249791735.

Adding to 203012345 its reverse (543210302), we get a palindrome (746222647).

The spelling of 203012345 in words is "two hundred three million, twelve thousand, three hundred forty-five".