212645923502 has 4 divisors (see below), whose sum is σ = 318968885256. Its totient is φ = 106322961750.

The previous prime is 212645923481. The next prime is 212645923513. The reversal of 212645923502 is 205329546212.

212645923502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212645923502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53161480874 + ... + 53161480877.

It is an arithmetic number, because the mean of its divisors is an integer number (79742221314).

Almost surely, 2^212645923502 is an apocalyptic number.

212645923502 is a deficient number, since it is larger than the sum of its proper divisors (106322961754).

212645923502 is a wasteful number, since it uses less digits than its factorization.

212645923502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106322961753.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 212645923502 in words is "two hundred twelve billion, six hundred forty-five million, nine hundred twenty-three thousand, five hundred two".