2221573257 has 16 divisors (see below), whose sum is σ = 3294247680. Its totient is φ = 1479686256.

The previous prime is 2221573253. The next prime is 2221573273. The reversal of 2221573257 is 7523751222.

It is not a de Polignac number, because 2221573257 - 2² = 2221573253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221573253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7518 + ... + 67079.

It is an arithmetic number, because the mean of its divisors is an integer number (205890480).

Almost surely, 2^2221573257 is an apocalyptic number.

2221573257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2221573257 is a deficient number, since it is larger than the sum of its proper divisors (1072674423).

2221573257 is a wasteful number, since it uses less digits than its factorization.

2221573257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75709 (or 75703 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 2221573257 is about 47133.5682608478. The cubic root of 2221573257 is about 1304.8288373744.

The spelling of 2221573257 in words is "two billion, two hundred twenty-one million, five hundred seventy-three thousand, two hundred fifty-seven".