7215481 has 16 divisors (see below), whose sum is σ = 9124864. Its totient is φ = 5552064.

The previous prime is 7215479. The next prime is 7215499. The reversal of 7215481 is 1845127.

It is not a de Polignac number, because 7215481 - 2¹ = 7215479 is a prime.

It is a super-2 number, since 2×7215481² = 104126332122722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7215401) 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 15 ways as a sum of consecutive naturals, for example, 2296 + ... + 4438.

It is an arithmetic number, because the mean of its divisors is an integer number (570304).

It is a Poulet number, since it divides 2^7215480-1.

Almost surely, 2^7215481 is an apocalyptic number.

It is an amenable number.

7215481 is a deficient number, since it is larger than the sum of its proper divisors (1909383).

7215481 is a wasteful number, since it uses less digits than its factorization.

7215481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200.

The product of its digits is 2240, while the sum is 28.

The square root of 7215481 is about 2686.1647380606. The cubic root of 7215481 is about 193.2361736009.

The spelling of 7215481 in words is "seven million, two hundred fifteen thousand, four hundred eighty-one".