234517221 has 16 divisors (see below), whose sum is σ = 347670400. Its totient is φ = 156237984.

The previous prime is 234517207. The next prime is 234517237. The reversal of 234517221 is 122715432.

It is not a de Polignac number, because 234517221 - 2⁷ = 234517093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234517291) 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, 69000 + ... + 72318.

It is an arithmetic number, because the mean of its divisors is an integer number (21729400).

Almost surely, 2^234517221 is an apocalyptic number.

It is an amenable number.

234517221 is a deficient number, since it is larger than the sum of its proper divisors (113153179).

234517221 is a wasteful number, since it uses less digits than its factorization.

234517221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945 (or 5939 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 234517221 is about 15313.9551063727. The cubic root of 234517221 is about 616.6777034629.

The spelling of 234517221 in words is "two hundred thirty-four million, five hundred seventeen thousand, two hundred twenty-one".