220454431 has 4 divisors (see below), whose sum is σ = 221686200. Its totient is φ = 219222664.

The previous prime is 220454387. The next prime is 220454449. The reversal of 220454431 is 134454022.

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 220454431 - 2⁷ = 220454303 is a prime.

It is a super-2 number, since 2×220454431² = 97200312295067522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220454396 and 220454405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220454831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615616 + ... + 615973.

It is an arithmetic number, because the mean of its divisors is an integer number (55421550).

Almost surely, 2^220454431 is an apocalyptic number.

220454431 is a deficient number, since it is larger than the sum of its proper divisors (1231769).

220454431 is a wasteful number, since it uses less digits than its factorization.

220454431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231768.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 220454431 is about 14847.7079375909. The cubic root of 220454431 is about 604.0964414443.

The spelling of 220454431 in words is "two hundred twenty million, four hundred fifty-four thousand, four hundred thirty-one".