212220042551 has 8 divisors (see below), whose sum is σ = 235308065808. Its totient is φ = 189764568000.

The previous prime is 212220042523. The next prime is 212220042581. The reversal of 212220042551 is 155240022212.

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

It is a cyclic number.

It is not a de Polignac number, because 212220042551 - 2¹⁸ = 212219780407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212220042551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220042581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158136470 + ... + 158137811.

It is an arithmetic number, because the mean of its divisors is an integer number (29413508226).

Almost surely, 2^212220042551 is an apocalyptic number.

212220042551 is a deficient number, since it is larger than the sum of its proper divisors (23088023257).

212220042551 is a wasteful number, since it uses less digits than its factorization.

212220042551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316274353.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 212220042551 its reverse (155240022212), we get a palindrome (367460064763).

The spelling of 212220042551 in words is "two hundred twelve billion, two hundred twenty million, forty-two thousand, five hundred fifty-one".