642231473 has 8 divisors (see below), whose sum is σ = 691830888. Its totient is φ = 592660224.

The previous prime is 642231451. The next prime is 642231487. The reversal of 642231473 is 374132246.

642231473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14077504 + 628153969 = 3752^2 + 25063^2 .

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

It is not a de Polignac number, because 642231473 - 2⁶ = 642231409 is a prime.

It is a super-2 number, since 2×642231473² = 824922529823499458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642234473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83915 + ... + 91247.

It is an arithmetic number, because the mean of its divisors is an integer number (86478861).

Almost surely, 2^642231473 is an apocalyptic number.

It is an amenable number.

642231473 is a deficient number, since it is larger than the sum of its proper divisors (49599415).

642231473 is a wasteful number, since it uses less digits than its factorization.

642231473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083.

The product of its digits is 24192, while the sum is 32.

The square root of 642231473 is about 25342.2862622929. The cubic root of 642231473 is about 862.7742897975.

The spelling of 642231473 in words is "six hundred forty-two million, two hundred thirty-one thousand, four hundred seventy-three".