203455145 has 16 divisors (see below), whose sum is σ = 250358592. Its totient is φ = 158639040.

The previous prime is 203455141. The next prime is 203455163. The reversal of 203455145 is 541554302.

It is not a de Polignac number, because 203455145 - 2² = 203455141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203455141) 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, 156950 + ... + 158240.

It is an arithmetic number, because the mean of its divisors is an integer number (15647412).

Almost surely, 2^203455145 is an apocalyptic number.

It is an amenable number.

203455145 is a deficient number, since it is larger than the sum of its proper divisors (46903447).

203455145 is a wasteful number, since it uses less digits than its factorization.

203455145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 203455145 is about 14263.7703641078. The cubic root of 203455145 is about 588.1519739605.

The spelling of 203455145 in words is "two hundred three million, four hundred fifty-five thousand, one hundred forty-five".