203130405 has 24 divisors (see below), whose sum is σ = 355391712. Its totient is φ = 107321184.

The previous prime is 203130401. The next prime is 203130469. The reversal of 203130405 is 504031302.

It is not a de Polignac number, because 203130405 - 2² = 203130401 is a prime.

It is a super-2 number, since 2×203130405² = 82523922870928050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203130401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16279 + ... + 25908.

It is an arithmetic number, because the mean of its divisors is an integer number (14807988).

Almost surely, 2^203130405 is an apocalyptic number.

It is an amenable number.

203130405 is a deficient number, since it is larger than the sum of its proper divisors (152261307).

203130405 is a wasteful number, since it uses less digits than its factorization.

203130405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42305 (or 42302 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 203130405 is about 14252.3824324216. The cubic root of 203130405 is about 587.8388858179.

Adding to 203130405 its reverse (504031302), we get a palindrome (707161707).

The spelling of 203130405 in words is "two hundred three million, one hundred thirty thousand, four hundred five".