234131220 has 72 divisors (see below), whose sum is σ = 733125120. Its totient is φ = 60419520.

The previous prime is 234131213. The next prime is 234131267. The reversal of 234131220 is 22131432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 234131193 and 234131202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15400 + ... + 26559.

Almost surely, 2^234131220 is an apocalyptic number.

234131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

234131220 is an abundant number, since it is smaller than the sum of its proper divisors (498993900).

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

234131220 is a wasteful number, since it uses less digits than its factorization.

234131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42005 (or 42000 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 234131220 is about 15301.3469995292. The cubic root of 234131220 is about 616.3391797395.

Adding to 234131220 its reverse (22131432), we get a palindrome (256262652).

The spelling of 234131220 in words is "two hundred thirty-four million, one hundred thirty-one thousand, two hundred twenty".