212312244551 has 4 divisors (see below), whose sum is σ = 231613357704. Its totient is φ = 193011131400.

The previous prime is 212312244541. The next prime is 212312244629. The reversal of 212312244551 is 155442213212.

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

It is a cyclic number.

It is not a de Polignac number, because 212312244551 - 2¹⁰ = 212312243527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212312244541) 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, 9650556560 + ... + 9650556581.

It is an arithmetic number, because the mean of its divisors is an integer number (57903339426).

Almost surely, 2^212312244551 is an apocalyptic number.

212312244551 is a deficient number, since it is larger than the sum of its proper divisors (19301113153).

212312244551 is a wasteful number, since it uses less digits than its factorization.

212312244551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301113152.

The product of its digits is 19200, while the sum is 32.

Adding to 212312244551 its reverse (155442213212), we get a palindrome (367754457763).

The spelling of 212312244551 in words is "two hundred twelve billion, three hundred twelve million, two hundred forty-four thousand, five hundred fifty-one".