421951223 has 4 divisors (see below), whose sum is σ = 422309688. Its totient is φ = 421592760.

The previous prime is 421951207. The next prime is 421951241. The reversal of 421951223 is 322159124.

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 421951223 - 2⁴ = 421951207 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 (421951273) 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, 177461 + ... + 179822.

It is an arithmetic number, because the mean of its divisors is an integer number (105577422).

Almost surely, 2^421951223 is an apocalyptic number.

421951223 is a deficient number, since it is larger than the sum of its proper divisors (358465).

421951223 is a wasteful number, since it uses less digits than its factorization.

421951223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358464.

The product of its digits is 4320, while the sum is 29.

The square root of 421951223 is about 20541.4513362615. The cubic root of 421951223 is about 750.0451664651.

The spelling of 421951223 in words is "four hundred twenty-one million, nine hundred fifty-one thousand, two hundred twenty-three".