471231661 has 4 divisors (see below), whose sum is σ = 472908924. Its totient is φ = 469554400.

The previous prime is 471231647. The next prime is 471231689. The reversal of 471231661 is 166132174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324216036 + 147015625 = 18006^2 + 12125^2 .

It is a cyclic number.

It is not a de Polignac number, because 471231661 - 2¹³ = 471223469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471231611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838210 + ... + 838771.

It is an arithmetic number, because the mean of its divisors is an integer number (118227231).

Almost surely, 2^471231661 is an apocalyptic number.

It is an amenable number.

471231661 is a deficient number, since it is larger than the sum of its proper divisors (1677263).

471231661 is a wasteful number, since it uses less digits than its factorization.

471231661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677262.

The product of its digits is 6048, while the sum is 31.

The square root of 471231661 is about 21707.8709458113. The cubic root of 471231661 is about 778.1765761870.

It can be divided in two parts, 47123 and 1661, that added together give a palindrome (48784).

The spelling of 471231661 in words is "four hundred seventy-one million, two hundred thirty-one thousand, six hundred sixty-one".