234128513 has 6 divisors (see below), whose sum is σ = 242481174. Its totient is φ = 226054304.

The previous prime is 234128509. The next prime is 234128527. The reversal of 234128513 is 315821432.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 43467649 + 190660864 = 6593^2 + 13808^2 .

It is not a de Polignac number, because 234128513 - 2² = 234128509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (234128413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138356 + ... + 140037.

It is an arithmetic number, because the mean of its divisors is an integer number (40413529).

Almost surely, 2^234128513 is an apocalyptic number.

It is an amenable number.

234128513 is a deficient number, since it is larger than the sum of its proper divisors (8352661).

234128513 is an equidigital number, since it uses as much as digits as its factorization.

234128513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278451 (or 278422 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 234128513 is about 15301.2585430088. The cubic root of 234128513 is about 616.3368043812.

Adding to 234128513 its reverse (315821432), we get a palindrome (549949945).

The spelling of 234128513 in words is "two hundred thirty-four million, one hundred twenty-eight thousand, five hundred thirteen".