2221430331 has 4 divisors (see below), whose sum is σ = 2961907112. Its totient is φ = 1480953552.

The previous prime is 2221430311. The next prime is 2221430357. The reversal of 2221430331 is 1330341222.

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

It is not a de Polignac number, because 2221430331 - 2¹⁰ = 2221429307 is a prime.

It is a super-2 number, since 2×2221430331² = 9869505430973539122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221430298 and 2221430307.

It is not an unprimeable number, because it can be changed into a prime (2221430311) 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, 370238386 + ... + 370238391.

It is an arithmetic number, because the mean of its divisors is an integer number (740476778).

Almost surely, 2^2221430331 is an apocalyptic number.

2221430331 is a deficient number, since it is larger than the sum of its proper divisors (740476781).

2221430331 is an equidigital number, since it uses as much as digits as its factorization.

2221430331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740476780.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2221430331 is about 47132.0520558993. The cubic root of 2221430331 is about 1304.8008545076.

Adding to 2221430331 its reverse (1330341222), we get a palindrome (3551771553).

The spelling of 2221430331 in words is "two billion, two hundred twenty-one million, four hundred thirty thousand, three hundred thirty-one".