9912551 has 4 divisors (see below), whose sum is σ = 10813704. Its totient is φ = 9011400.

The previous prime is 9912541. The next prime is 9912557. The reversal of 9912551 is 1552199.

9912551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9912551 - 2¹⁴ = 9896167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9912557) 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, 450560 + ... + 450581.

It is an arithmetic number, because the mean of its divisors is an integer number (2703426).

Almost surely, 2^9912551 is an apocalyptic number.

9912551 is a deficient number, since it is larger than the sum of its proper divisors (901153).

9912551 is a wasteful number, since it uses less digits than its factorization.

9912551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901152.

The product of its digits is 4050, while the sum is 32.

The square root of 9912551 is about 3148.4203975962. The cubic root of 9912551 is about 214.8136188968.

The spelling of 9912551 in words is "nine million, nine hundred twelve thousand, five hundred fifty-one".