420156231 has 8 divisors (see below), whose sum is σ = 611136384. Its totient is φ = 254640120.

The previous prime is 420156229. The next prime is 420156301. The reversal of 420156231 is 132651024.

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

It is not a de Polignac number, because 420156231 - 2¹ = 420156229 is a prime.

It is a super-2 number, since 2×420156231² = 353062516896250722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420156131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6365971 + ... + 6366036.

It is an arithmetic number, because the mean of its divisors is an integer number (76392048).

Almost surely, 2^420156231 is an apocalyptic number.

420156231 is a deficient number, since it is larger than the sum of its proper divisors (190980153).

420156231 is a wasteful number, since it uses less digits than its factorization.

420156231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732021.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 420156231 is about 20497.7128236299. The cubic root of 420156231 is about 748.9800838791.

It can be divided in two parts, 420 and 156231, that added together give a palindrome (156651).

The spelling of 420156231 in words is "four hundred twenty million, one hundred fifty-six thousand, two hundred thirty-one".