531215126212226 has 4 divisors (see below), whose sum is σ = 796822689318342. Its totient is φ = 265607563106112.

The previous prime is 531215126212201. The next prime is 531215126212229. The reversal of 531215126212226 is 622212621512135.

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

It can be written as a sum of positive squares in only one way, i.e., 485783684331001 + 45431441881225 = 22040501^2 + 6740285^2 .

It is not an unprimeable number, because it can be changed into a prime (531215126212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132803781553055 + ... + 132803781553058.

Almost surely, 2^{531215126212226} is an apocalyptic number.

531215126212226 is a deficient number, since it is larger than the sum of its proper divisors (265607563106116).

531215126212226 is a wasteful number, since it uses less digits than its factorization.

531215126212226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265607563106115.

The product of its digits is 172800, while the sum is 41.

The spelling of 531215126212226 in words is "five hundred thirty-one trillion, two hundred fifteen billion, one hundred twenty-six million, two hundred twelve thousand, two hundred twenty-six".