212523243434 has 8 divisors (see below), whose sum is σ = 320189204448. Its totient is φ = 105793508620.

The previous prime is 212523243431. The next prime is 212523243451. The reversal of 212523243434 is 434342325212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×212523243434² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212523243394 and 212523243403.

It is not an unprimeable number, because it can be changed into a prime (212523243431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234055982 + ... + 234056889.

It is an arithmetic number, because the mean of its divisors is an integer number (40023650556).

Almost surely, 2^212523243434 is an apocalyptic number.

212523243434 is a deficient number, since it is larger than the sum of its proper divisors (107665961014).

212523243434 is a wasteful number, since it uses less digits than its factorization.

212523243434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468113100.

The product of its digits is 138240, while the sum is 35.

Adding to 212523243434 its reverse (434342325212), we get a palindrome (646865568646).

The spelling of 212523243434 in words is "two hundred twelve billion, five hundred twenty-three million, two hundred forty-three thousand, four hundred thirty-four".