234681821 has 8 divisors (see below), whose sum is σ = 271076544. Its totient is φ = 200797120.

The previous prime is 234681817. The next prime is 234681829. The reversal of 234681821 is 128186432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 234681821 - 2² = 234681817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234681829) 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, 627305 + ... + 627678.

It is an arithmetic number, because the mean of its divisors is an integer number (33884568).

Almost surely, 2^234681821 is an apocalyptic number.

It is an amenable number.

234681821 is a deficient number, since it is larger than the sum of its proper divisors (36394723).

234681821 is a wasteful number, since it uses less digits than its factorization.

234681821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255011.

The product of its digits is 18432, while the sum is 35.

The square root of 234681821 is about 15319.3283468956. The cubic root of 234681821 is about 616.8219450543.

The spelling of 234681821 in words is "two hundred thirty-four million, six hundred eighty-one thousand, eight hundred twenty-one".