212552222451 has 16 divisors (see below), whose sum is σ = 286460848128. Its totient is φ = 140180738400.

The previous prime is 212552222371. The next prime is 212552222461. The reversal of 212552222451 is 154222255212.

It is not a de Polignac number, because 212552222451 - 2¹¹ = 212552220403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212552222461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921001 + ... + 1128426.

It is an arithmetic number, because the mean of its divisors is an integer number (17903803008).

Almost surely, 2^212552222451 is an apocalyptic number.

212552222451 is a deficient number, since it is larger than the sum of its proper divisors (73908625677).

212552222451 is a wasteful number, since it uses less digits than its factorization.

212552222451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049802.

The product of its digits is 32000, while the sum is 33.

Adding to 212552222451 its reverse (154222255212), we get a palindrome (366774477663).

The spelling of 212552222451 in words is "two hundred twelve billion, five hundred fifty-two million, two hundred twenty-two thousand, four hundred fifty-one".