234216551 has 4 divisors (see below), whose sum is σ = 234250632. Its totient is φ = 234182472.

The previous prime is 234216547. The next prime is 234216581. The reversal of 234216551 is 155612432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 234216551 - 2² = 234216547 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 (234216581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720 + ... + 21813.

It is an arithmetic number, because the mean of its divisors is an integer number (58562658).

Almost surely, 2^234216551 is an apocalyptic number.

234216551 is a deficient number, since it is larger than the sum of its proper divisors (34081).

234216551 is an equidigital number, since it uses as much as digits as its factorization.

234216551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34080.

The product of its digits is 7200, while the sum is 29.

The square root of 234216551 is about 15304.1350948036. The cubic root of 234216551 is about 616.4140472298.

Adding to 234216551 its reverse (155612432), we get a palindrome (389828983).

The spelling of 234216551 in words is "two hundred thirty-four million, two hundred sixteen thousand, five hundred fifty-one".