234152721 has 16 divisors (see below), whose sum is σ = 378429120. Its totient is φ = 141910560.

The previous prime is 234152717. The next prime is 234152749. The reversal of 234152721 is 127251432.

It is not a de Polignac number, because 234152721 - 2² = 234152717 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (234152771) 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, 393900 + ... + 394493.

It is an arithmetic number, because the mean of its divisors is an integer number (23651820).

Almost surely, 2^234152721 is an apocalyptic number.

It is an amenable number.

234152721 is a deficient number, since it is larger than the sum of its proper divisors (144276399).

234152721 is a wasteful number, since it uses less digits than its factorization.

234152721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788413 (or 788407 counting only the distinct ones).

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

The square root of 234152721 is about 15302.0495686035. The cubic root of 234152721 is about 616.3580459449.

The spelling of 234152721 in words is "two hundred thirty-four million, one hundred fifty-two thousand, seven hundred twenty-one".