420236331 has 16 divisors (see below), whose sum is σ = 567020160. Its totient is φ = 276825600.

The previous prime is 420236321. The next prime is 420236339. The reversal of 420236331 is 133632024.

It is not a de Polignac number, because 420236331 - 2¹³ = 420228139 is a prime.

It is a super-2 number, since 2×420236331² = 353197147784683122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420236339) 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, 85131 + ... + 89931.

It is an arithmetic number, because the mean of its divisors is an integer number (35438760).

Almost surely, 2^420236331 is an apocalyptic number.

420236331 is a deficient number, since it is larger than the sum of its proper divisors (146783829).

420236331 is a wasteful number, since it uses less digits than its factorization.

420236331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 420236331 is about 20499.6666070451. Note that the first 4 decimals coincide. The cubic root of 420236331 is about 749.0276768840.

Adding to 420236331 its reverse (133632024), we get a palindrome (553868355).

The spelling of 420236331 in words is "four hundred twenty million, two hundred thirty-six thousand, three hundred thirty-one".