7150221 has 24 divisors (see below), whose sum is σ = 11477760. Its totient is φ = 4397328.

The previous prime is 7150219. The next prime is 7150223. The reversal of 7150221 is 1220517.

It is an interprime number because it is at equal distance from previous prime (7150219) and next prime (7150223).

It is not a de Polignac number, because 7150221 - 2¹ = 7150219 is a prime.

It is a super-2 number, since 2×7150221² = 102251320697682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7150194 and 7150203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7150223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3780 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (478240).

Almost surely, 2^7150221 is an apocalyptic number.

It is an amenable number.

7150221 is a deficient number, since it is larger than the sum of its proper divisors (4327539).

7150221 is a wasteful number, since it uses less digits than its factorization.

7150221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 7150221 is about 2673.9897157618. The cubic root of 7150221 is about 192.6518372519.

Adding to 7150221 its reverse (1220517), we get a palindrome (8370738).

The spelling of 7150221 in words is "seven million, one hundred fifty thousand, two hundred twenty-one".