234320557 has 4 divisors (see below), whose sum is σ = 237286720. Its totient is φ = 231354396.

The previous prime is 234320533. The next prime is 234320591. The reversal of 234320557 is 755023432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 234320557 - 2¹¹ = 234318509 is a prime.

It is a super-2 number, since 2×234320557² = 109812246865580498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234320057) 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, 1482963 + ... + 1483120.

It is an arithmetic number, because the mean of its divisors is an integer number (59321680).

Almost surely, 2^234320557 is an apocalyptic number.

It is an amenable number.

234320557 is a deficient number, since it is larger than the sum of its proper divisors (2966163).

234320557 is an equidigital number, since it uses as much as digits as its factorization.

234320557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966162.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 234320557 is about 15307.5326881898. The cubic root of 234320557 is about 616.5052751580.

Adding to 234320557 its reverse (755023432), we get a palindrome (989343989).

The spelling of 234320557 in words is "two hundred thirty-four million, three hundred twenty thousand, five hundred fifty-seven".