420140331 has 64 divisors (see below), whose sum is σ = 716083200. Its totient is φ = 241304832.

The previous prime is 420140327. The next prime is 420140339. The reversal of 420140331 is 133041024.

It is not a de Polignac number, because 420140331 - 2² = 420140327 is a prime.

It is a super-2 number, since 2×420140331² = 353035795465579122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420140339) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 486406 + ... + 487268.

It is an arithmetic number, because the mean of its divisors is an integer number (11188800).

Almost surely, 2^420140331 is an apocalyptic number.

420140331 is a deficient number, since it is larger than the sum of its proper divisors (295942869).

420140331 is a wasteful number, since it uses less digits than its factorization.

420140331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 420140331 is about 20497.3249718103. The cubic root of 420140331 is about 748.9706358590.

Adding to 420140331 its reverse (133041024), we get a palindrome (553181355).

The spelling of 420140331 in words is "four hundred twenty million, one hundred forty thousand, three hundred thirty-one".