231026420 has 24 divisors (see below), whose sum is σ = 488138784. Its totient is φ = 91842336.

The previous prime is 231026399. The next prime is 231026423. The reversal of 231026420 is 24620132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231026392 and 231026401.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32174 + ... + 38693.

It is an arithmetic number, because the mean of its divisors is an integer number (20339116).

Almost surely, 2^231026420 is an apocalyptic number.

231026420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231026420 is an abundant number, since it is smaller than the sum of its proper divisors (257112364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231026420 is a wasteful number, since it uses less digits than its factorization.

231026420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71039 (or 71037 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231026420 is about 15199.5532829093. The cubic root of 231026420 is about 613.6026352298.

Adding to 231026420 its reverse (24620132), we get a palindrome (255646552).

The spelling of 231026420 in words is "two hundred thirty-one million, twenty-six thousand, four hundred twenty".