7481551 has 20 divisors (see below), whose sum is σ = 9534160. Its totient is φ = 5749920.

The previous prime is 7481549. The next prime is 7481563. The reversal of 7481551 is 1551847.

7481551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7481551 - 2¹ = 7481549 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 (7481531) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 102451 + ... + 102523.

It is an arithmetic number, because the mean of its divisors is an integer number (476708).

Almost surely, 2^7481551 is an apocalyptic number.

7481551 is a deficient number, since it is larger than the sum of its proper divisors (2052609).

7481551 is an frugal number, since it uses more digits than its factorization.

7481551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 91 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 7481551 is about 2735.2424024207. The cubic root of 7481551 is about 195.5827494011.

The spelling of 7481551 in words is "seven million, four hundred eighty-one thousand, five hundred fifty-one".