212403553351 has 4 divisors (see below), whose sum is σ = 231712967304. Its totient is φ = 193094139400.

The previous prime is 212403553321. The next prime is 212403553357. The reversal of 212403553351 is 153355304212.

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 212403553351 - 2⁷ = 212403553223 is a prime.

It is a super-2 number, since 2×212403553351² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212403553357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9654706960 + ... + 9654706981.

It is an arithmetic number, because the mean of its divisors is an integer number (57928241826).

Almost surely, 2^212403553351 is an apocalyptic number.

212403553351 is a deficient number, since it is larger than the sum of its proper divisors (19309413953).

212403553351 is a wasteful number, since it uses less digits than its factorization.

212403553351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19309413952.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 212403553351 its reverse (153355304212), we get a palindrome (365758857563).

The spelling of 212403553351 in words is "two hundred twelve billion, four hundred three million, five hundred fifty-three thousand, three hundred fifty-one".