2231827621 has 4 divisors (see below), whose sum is σ = 2233223244. Its totient is φ = 2230432000.

The previous prime is 2231827589. The next prime is 2231827627. The reversal of 2231827621 is 1267281322.

It is a happy number.

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 1633291396 + 598536225 = 40414^2 + 24465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231827621 - 2⁵ = 2231827589 is a prime.

It is a super-3 number, since 3×2231827621³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231827627) 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, 695410 + ... + 698611.

It is an arithmetic number, because the mean of its divisors is an integer number (558305811).

Almost surely, 2^2231827621 is an apocalyptic number.

It is an amenable number.

2231827621 is a deficient number, since it is larger than the sum of its proper divisors (1395623).

2231827621 is a wasteful number, since it uses less digits than its factorization.

2231827621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395622.

The product of its digits is 16128, while the sum is 34.

The square root of 2231827621 is about 47242.2228626046. Note that the first 3 decimals coincide. The cubic root of 2231827621 is about 1306.8333711181.

The spelling of 2231827621 in words is "two billion, two hundred thirty-one million, eight hundred twenty-seven thousand, six hundred twenty-one".