10649551 has 4 divisors (see below), whose sum is σ = 11617704. Its totient is φ = 9681400.

The previous prime is 10649501. The next prime is 10649567. The reversal of 10649551 is 15594601.

10649551 = T₁₃₈₆ + T₁₃₈₇ + ... + T₁₃₉₆.

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 10649551 - 2⁹ = 10649039 is a prime.

It is a super-2 number, since 2×10649551² = 226825873003202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10649501) 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, 484060 + ... + 484081.

It is an arithmetic number, because the mean of its divisors is an integer number (2904426).

Almost surely, 2^10649551 is an apocalyptic number.

10649551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10649551 is a deficient number, since it is larger than the sum of its proper divisors (968153).

10649551 is an equidigital number, since it uses as much as digits as its factorization.

10649551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968152.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 10649551 is about 3263.3649811199. The cubic root of 10649551 is about 220.0106812996.

The spelling of 10649551 in words is "ten million, six hundred forty-nine thousand, five hundred fifty-one".