231026421 has 16 divisors (see below), whose sum is σ = 322853760. Its totient is φ = 146667840.

The previous prime is 231026399. The next prime is 231026423. The reversal of 231026421 is 124620132.

It is not a de Polignac number, because 231026421 - 2⁹ = 231025909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231026423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8491 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (20178360).

Almost surely, 2^231026421 is an apocalyptic number.

It is an amenable number.

231026421 is a deficient number, since it is larger than the sum of its proper divisors (91827339).

231026421 is a wasteful number, since it uses less digits than its factorization.

231026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14876.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 231026421 is about 15199.5533158050. The cubic root of 231026421 is about 613.6026361151.

Adding to 231026421 its reverse (124620132), we get a palindrome (355646553).

The spelling of 231026421 in words is "two hundred thirty-one million, twenty-six thousand, four hundred twenty-one".