7115551 has 4 divisors (see below), whose sum is σ = 7186104. Its totient is φ = 7045000.

The previous prime is 7115539. The next prime is 7115561. The reversal of 7115551 is 1555117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7115551 - 2²¹ = 5018399 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 (7115501) 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 3 ways as a sum of consecutive naturals, for example, 35125 + ... + 35326.

It is an arithmetic number, because the mean of its divisors is an integer number (1796526).

Almost surely, 2^7115551 is an apocalyptic number.

7115551 is a deficient number, since it is larger than the sum of its proper divisors (70553).

7115551 is a wasteful number, since it uses less digits than its factorization.

7115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70552.

The product of its digits is 875, while the sum is 25.

The square root of 7115551 is about 2667.4990159323. The cubic root of 7115551 is about 192.3399558053.

The spelling of 7115551 in words is "seven million, one hundred fifteen thousand, five hundred fifty-one".