203431100425 has 48 divisors (see below), whose sum is σ = 291027444480. Its totient is φ = 138173091840.

The previous prime is 203431100393. The next prime is 203431100441. The reversal of 203431100425 is 524001134302.

It is not a de Polignac number, because 203431100425 - 2⁵ = 203431100393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 203431100425.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51591004 + ... + 51594946.

It is an arithmetic number, because the mean of its divisors is an integer number (6063071760).

Almost surely, 2^203431100425 is an apocalyptic number.

203431100425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203431100425 is a deficient number, since it is larger than the sum of its proper divisors (87596344055).

203431100425 is a wasteful number, since it uses less digits than its factorization.

203431100425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682 (or 6677 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 203431100425 its reverse (524001134302), we get a palindrome (727432234727).

The spelling of 203431100425 in words is "two hundred three billion, four hundred thirty-one million, one hundred thousand, four hundred twenty-five".