8220257445 has 16 divisors (see below), whose sum is σ = 13576684032. Its totient is φ = 4242713280.

The previous prime is 8220257407. The next prime is 8220257449. The reversal of 8220257445 is 5447520228.

It is not a de Polignac number, because 8220257445 - 2⁸ = 8220257189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220257449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8838522 + ... + 8839451.

It is an arithmetic number, because the mean of its divisors is an integer number (848542752).

Almost surely, 2^8220257445 is an apocalyptic number.

It is an amenable number.

8220257445 is a deficient number, since it is larger than the sum of its proper divisors (5356426587).

8220257445 is a wasteful number, since it uses less digits than its factorization.

8220257445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17678012.

The product of its (nonzero) digits is 179200, while the sum is 39.

The square root of 8220257445 is about 90665.6354138656. The cubic root of 8220257445 is about 2018.1888681614.

The spelling of 8220257445 in words is "eight billion, two hundred twenty million, two hundred fifty-seven thousand, four hundred forty-five".