231026403 has 16 divisors (see below), whose sum is σ = 313479936. Its totient is φ = 151310880.

The previous prime is 231026399. The next prime is 231026423. The reversal of 231026403 is 304620132.

It is a happy number.

It is not a de Polignac number, because 231026403 - 2² = 231026399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231026403.

It is not an unprimeable number, because it can be changed into a prime (231026423) 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, 63625 + ... + 67157.

It is an arithmetic number, because the mean of its divisors is an integer number (19592496).

Almost surely, 2^231026403 is an apocalyptic number.

231026403 is a deficient number, since it is larger than the sum of its proper divisors (82453533).

231026403 is a wasteful number, since it uses less digits than its factorization.

231026403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231026403 is about 15199.5527236824. The cubic root of 231026403 is about 613.6026201792.

Adding to 231026403 its reverse (304620132), we get a palindrome (535646535).

The spelling of 231026403 in words is "two hundred thirty-one million, twenty-six thousand, four hundred three".