231000420 has 96 divisors (see below), whose sum is σ = 782707968. Its totient is φ = 49692672.

The previous prime is 231000391. The next prime is 231000439. The reversal of 231000420 is 24000132.

It is a super-2 number, since 2×231000420² = 106722388080352800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 231000396 and 231000405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9037 + ... + 23316.

It is an arithmetic number, because the mean of its divisors is an integer number (8153208).

Almost surely, 2^231000420 is an apocalyptic number.

231000420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231000420 is an abundant number, since it is smaller than the sum of its proper divisors (551707548).

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

231000420 is a wasteful number, since it uses less digits than its factorization.

231000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32389 (or 32387 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 231000420 is about 15198.6979705500. The cubic root of 231000420 is about 613.5796158322.

Adding to 231000420 its reverse (24000132), we get a palindrome (255000552).

The spelling of 231000420 in words is "two hundred thirty-one million, four hundred twenty", and thus it is an aban number.