420223551 has 32 divisors (see below), whose sum is σ = 652289280. Its totient is φ = 237945600.

The previous prime is 420223523. The next prime is 420223579. The reversal of 420223551 is 155322024.

It is an interprime number because it is at equal distance from previous prime (420223523) and next prime (420223579).

It is not a de Polignac number, because 420223551 - 2⁵ = 420223519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420223151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41181 + ... + 50361.

It is an arithmetic number, because the mean of its divisors is an integer number (20384040).

Almost surely, 2^420223551 is an apocalyptic number.

420223551 is a deficient number, since it is larger than the sum of its proper divisors (232065729).

420223551 is a wasteful number, since it uses less digits than its factorization.

420223551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 420223551 is about 20499.3548922887. The cubic root of 420223551 is about 749.0200837988.

Adding to 420223551 its reverse (155322024), we get a palindrome (575545575).

The spelling of 420223551 in words is "four hundred twenty million, two hundred twenty-three thousand, five hundred fifty-one".