203401005 has 32 divisors (see below), whose sum is σ = 345472128. Its totient is φ = 101836800.

The previous prime is 203400997. The next prime is 203401021. The reversal of 203401005 is 500104302.

It is not a de Polignac number, because 203401005 - 2³ = 203400997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132090 + ... + 133620.

It is an arithmetic number, because the mean of its divisors is an integer number (10796004).

Almost surely, 2^203401005 is an apocalyptic number.

It is an amenable number.

203401005 is a deficient number, since it is larger than the sum of its proper divisors (142071123).

203401005 is a wasteful number, since it uses less digits than its factorization.

203401005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 203401005 is about 14261.8724226519. The cubic root of 203401005 is about 588.0997996876.

Adding to 203401005 its reverse (500104302), we get a palindrome (703505307).

The spelling of 203401005 in words is "two hundred three million, four hundred one thousand, five".