420315531 has 48 divisors (see below), whose sum is σ = 627016800. Its totient is φ = 250048512.

The previous prime is 420315509. The next prime is 420315541. The reversal of 420315531 is 135513024.

It is not a de Polignac number, because 420315531 - 2¹³ = 420307339 is a prime.

It is a super-2 number, since 2×420315531² = 353330291199623922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420315541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1835325 + ... + 1835553.

It is an arithmetic number, because the mean of its divisors is an integer number (13062850).

Almost surely, 2^420315531 is an apocalyptic number.

420315531 is a deficient number, since it is larger than the sum of its proper divisors (206701269).

420315531 is a wasteful number, since it uses less digits than its factorization.

420315531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 420315531 is about 20501.5982547703. The cubic root of 420315531 is about 749.0747291902.

Adding to 420315531 its reverse (135513024), we get a palindrome (555828555).

The spelling of 420315531 in words is "four hundred twenty million, three hundred fifteen thousand, five hundred thirty-one".