2221631057 has 4 divisors (see below), whose sum is σ = 2226692160. Its totient is φ = 2216569956.

The previous prime is 2221631053. The next prime is 2221631059. The reversal of 2221631057 is 7501361222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7501361222 = 2 ⋅3750680611.

It is a cyclic number.

It is not a de Polignac number, because 2221631057 - 2² = 2221631053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221631053) 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, 2529893 + ... + 2530770.

It is an arithmetic number, because the mean of its divisors is an integer number (556673040).

Almost surely, 2^2221631057 is an apocalyptic number.

It is an amenable number.

2221631057 is a deficient number, since it is larger than the sum of its proper divisors (5061103).

2221631057 is an equidigital number, since it uses as much as digits as its factorization.

2221631057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061102.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2221631057 is about 47134.1814079761. The cubic root of 2221631057 is about 1304.8401534470.

Adding to 2221631057 its reverse (7501361222), we get a palindrome (9722992279).

The spelling of 2221631057 in words is "two billion, two hundred twenty-one million, six hundred thirty-one thousand, fifty-seven".