7151220 has 192 divisors, whose sum is σ = 25401600. Its totient is φ = 1658880.

The previous prime is 7151219. The next prime is 7151227. The reversal of 7151220 is 221517.

It is a super-2 number, since 2×7151220² = 102279894976800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 7151193 and 7151202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7151227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174400 + ... + 174440.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

Almost surely, 2^7151220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7151220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12700800).

7151220 is an abundant number, since it is smaller than the sum of its proper divisors (18250380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7151220 is a wasteful number, since it uses less digits than its factorization.

7151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 87 counting only the distinct ones).

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

The square root of 7151220 is about 2674.1765087593. The cubic root of 7151220 is about 192.6608090129.

Adding to 7151220 its reverse (221517), we get a palindrome (7372737).

The spelling of 7151220 in words is "seven million, one hundred fifty-one thousand, two hundred twenty".