234613821 has 16 divisors (see below), whose sum is σ = 356698944. Its totient is φ = 135884544.

The previous prime is 234613817. The next prime is 234613837. The reversal of 234613821 is 128316432.

It is not a de Polignac number, because 234613821 - 2² = 234613817 is a prime.

234613821 is a modest number, since divided by 13821 gives 2346 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234613811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176271 + ... + 177596.

It is an arithmetic number, because the mean of its divisors is an integer number (22293684).

Almost surely, 2^234613821 is an apocalyptic number.

It is an amenable number.

234613821 is a deficient number, since it is larger than the sum of its proper divisors (122085123).

234613821 is a wasteful number, since it uses less digits than its factorization.

234613821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353900.

The product of its digits is 6912, while the sum is 30.

The square root of 234613821 is about 15317.1087676493. The cubic root of 234613821 is about 616.7623637542.

The spelling of 234613821 in words is "two hundred thirty-four million, six hundred thirteen thousand, eight hundred twenty-one".