215453424212 has 24 divisors (see below), whose sum is σ = 429931947816. Its totient is φ = 93590627328.

The previous prime is 215453424139. The next prime is 215453424257. The reversal of 215453424212 is 212424354512.

It can be written as a sum of positive squares in 4 ways, for example, as 1597121296 + 213856302916 = 39964^2 + 462446^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121861913 + ... + 121863680.

It is an arithmetic number, because the mean of its divisors is an integer number (17913831159).

Almost surely, 2^215453424212 is an apocalyptic number.

It is an amenable number.

215453424212 is a deficient number, since it is larger than the sum of its proper divisors (214478523604).

215453424212 is a wasteful number, since it uses less digits than its factorization.

215453424212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243725627 (or 243725625 counting only the distinct ones).

The product of its digits is 76800, while the sum is 35.

Adding to 215453424212 its reverse (212424354512), we get a palindrome (427877778724).

The spelling of 215453424212 in words is "two hundred fifteen billion, four hundred fifty-three million, four hundred twenty-four thousand, two hundred twelve".