7145176221 has 12 divisors (see below), whose sum is σ = 10322978848. Its totient is φ = 4762449864.

The previous prime is 7145176201. The next prime is 7145176237. The reversal of 7145176221 is 1226715417.

7145176221 is a `hidden beast` number, since 7 + 14 + 5 + 17 + 622 + 1 = 666.

It is not a de Polignac number, because 7145176221 - 2¹³ = 7145168029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145176201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36835 + ... + 125088.

Almost surely, 2^7145176221 is an apocalyptic number.

It is an amenable number.

7145176221 is a deficient number, since it is larger than the sum of its proper divisors (3177802627).

7145176221 is a wasteful number, since it uses less digits than its factorization.

7145176221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166832 (or 166829 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 7145176221 is about 84529.1442107395. The cubic root of 7145176221 is about 1926.0651862462.

The spelling of 7145176221 in words is "seven billion, one hundred forty-five million, one hundred seventy-six thousand, two hundred twenty-one".