212191303454 has 32 divisors (see below), whose sum is σ = 346581607680. Its totient is φ = 96849043200.

The previous prime is 212191303391. The next prime is 212191303501. The reversal of 212191303454 is 454303191212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404659 + ... + 1548369.

It is an arithmetic number, because the mean of its divisors is an integer number (10830675240).

Almost surely, 2^212191303454 is an apocalyptic number.

212191303454 is a deficient number, since it is larger than the sum of its proper divisors (134390304226).

212191303454 is a wasteful number, since it uses less digits than its factorization.

212191303454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144356.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 212191303454 its reverse (454303191212), we get a palindrome (666494494666).

The spelling of 212191303454 in words is "two hundred twelve billion, one hundred ninety-one million, three hundred three thousand, four hundred fifty-four".