9123551 has 4 divisors (see below), whose sum is σ = 9129600. Its totient is φ = 9117504.

The previous prime is 9123533. The next prime is 9123557. The reversal of 9123551 is 1553219.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1553219 = 79 ⋅19661.

It is a cyclic number.

It is not a de Polignac number, because 9123551 - 2¹⁴ = 9107167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9123551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9123557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (2282400).

Almost surely, 2^9123551 is an apocalyptic number.

9123551 is a deficient number, since it is larger than the sum of its proper divisors (6049).

9123551 is a wasteful number, since it uses less digits than its factorization.

9123551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6048.

The product of its digits is 1350, while the sum is 26.

The square root of 9123551 is about 3020.5216436900. The cubic root of 9123551 is about 208.9558982975.

The spelling of 9123551 in words is "nine million, one hundred twenty-three thousand, five hundred fifty-one".