420212531 has 8 divisors (see below), whose sum is σ = 444624720. Its totient is φ = 396029952.

The previous prime is 420212519. The next prime is 420212561. The reversal of 420212531 is 135212024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420212531 - 2⁶ = 420212467 is a prime.

It is a super-2 number, since 2×420212531² = 353157142418851922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420212561) 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 7 ways as a sum of consecutive naturals, for example, 53630 + ... + 60963.

It is an arithmetic number, because the mean of its divisors is an integer number (55578090).

Almost surely, 2^420212531 is an apocalyptic number.

420212531 is a deficient number, since it is larger than the sum of its proper divisors (24412189).

420212531 is a wasteful number, since it uses less digits than its factorization.

420212531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114805.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 420212531 is about 20499.0861015802. The cubic root of 420212531 is about 749.0135362731.

Adding to 420212531 its reverse (135212024), we get a palindrome (555424555).

The spelling of 420212531 in words is "four hundred twenty million, two hundred twelve thousand, five hundred thirty-one".