213454923 has 16 divisors (see below), whose sum is σ = 310995072. Its totient is φ = 129152000.

The previous prime is 213454909. The next prime is 213454939. The reversal of 213454923 is 329454312.

It is a cyclic number.

It is not a de Polignac number, because 213454923 - 2⁹ = 213454411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (213454823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16108 + ... + 26198.

It is an arithmetic number, because the mean of its divisors is an integer number (19437192).

Almost surely, 2^213454923 is an apocalyptic number.

213454923 is a deficient number, since it is larger than the sum of its proper divisors (97540149).

213454923 is a wasteful number, since it uses less digits than its factorization.

213454923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10746.

The product of its digits is 25920, while the sum is 33.

The square root of 213454923 is about 14610.0966115902. The cubic root of 213454923 is about 597.6341305871.

The spelling of 213454923 in words is "two hundred thirteen million, four hundred fifty-four thousand, nine hundred twenty-three".