231420 has 96 divisors (see below), whose sum is σ = 806400. Its totient is φ = 48384.

The previous prime is 231419. The next prime is 231431. The reversal of 231420 is 24132.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 231396 and 231405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7966 + ... + 7994.

It is an arithmetic number, because the mean of its divisors is an integer number (8400).

2²³¹⁴²⁰ is an apocalyptic number.

231420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403200).

231420 is an abundant number, since it is smaller than the sum of its proper divisors (574980).

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

231420 is a wasteful number, since it uses less digits than its factorization.

231420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 65 counting only the distinct ones).

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

The square root of 231420 is about 481.0613266518. The cubic root of 231420 is about 61.3950885029.

Adding to 231420 its reverse (24132), we get a palindrome (255552).

It can be divided in two parts, 231 and 420, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 231420 in words is "two hundred thirty-one thousand, four hundred twenty".