212545403423 has 4 divisors (see below), whose sum is σ = 213498522048. Its totient is φ = 211592284800.

The previous prime is 212545403387. The next prime is 212545403429. The reversal of 212545403423 is 324304545212.

It is a happy number.

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 212545403423 - 2¹⁶ = 212545337887 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 (212545403429) 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, 476558978 + ... + 476559423.

It is an arithmetic number, because the mean of its divisors is an integer number (53374630512).

Almost surely, 2^212545403423 is an apocalyptic number.

212545403423 is a deficient number, since it is larger than the sum of its proper divisors (953118625).

212545403423 is an equidigital number, since it uses as much as digits as its factorization.

212545403423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953118624.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 212545403423 its reverse (324304545212), we get a palindrome (536849948635).

The spelling of 212545403423 in words is "two hundred twelve billion, five hundred forty-five million, four hundred three thousand, four hundred twenty-three".