642268231 has 8 divisors (see below), whose sum is σ = 711114624. Its totient is φ = 575164920.

The previous prime is 642268213. The next prime is 642268243. The reversal of 642268231 is 132862246.

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

It is not a de Polignac number, because 642268231 - 2¹⁷ = 642137159 is a prime.

It is a super-2 number, since 2×642268231² = 825016961103738722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642268271) 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, 434995 + ... + 436468.

It is an arithmetic number, because the mean of its divisors is an integer number (88889328).

Almost surely, 2^642268231 is an apocalyptic number.

642268231 is a deficient number, since it is larger than the sum of its proper divisors (68846393).

642268231 is a wasteful number, since it uses less digits than its factorization.

642268231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871541.

The product of its digits is 27648, while the sum is 34.

The square root of 642268231 is about 25343.0114824580. The cubic root of 642268231 is about 862.7907497260.

The spelling of 642268231 in words is "six hundred forty-two million, two hundred sixty-eight thousand, two hundred thirty-one".