212645423 has 4 divisors (see below), whose sum is σ = 215558448. Its totient is φ = 209732400.

The previous prime is 212645413. The next prime is 212645431. The reversal of 212645423 is 324546212.

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 212645423 - 2²² = 208451119 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 (212645413) 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, 1456403 + ... + 1456548.

It is an arithmetic number, because the mean of its divisors is an integer number (53889612).

Almost surely, 2^212645423 is an apocalyptic number.

212645423 is a deficient number, since it is larger than the sum of its proper divisors (2913025).

212645423 is an equidigital number, since it uses as much as digits as its factorization.

212645423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913024.

The product of its digits is 11520, while the sum is 29.

The square root of 212645423 is about 14582.3668517837. The cubic root of 212645423 is about 596.8776903399.

The spelling of 212645423 in words is "two hundred twelve million, six hundred forty-five thousand, four hundred twenty-three".