10990551 has 48 divisors (see below), whose sum is σ = 18500832. Its totient is φ = 5744640.

The previous prime is 10990547. The next prime is 10990561. The reversal of 10990551 is 15509901.

It is not a de Polignac number, because 10990551 - 2² = 10990547 is a prime.

It is a super-2 number, since 2×10990551² = 241584422567202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10990541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80155 + ... + 80291.

It is an arithmetic number, because the mean of its divisors is an integer number (385434).

Almost surely, 2^10990551 is an apocalyptic number.

10990551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10990551 is a deficient number, since it is larger than the sum of its proper divisors (7510281).

10990551 is a wasteful number, since it uses less digits than its factorization.

10990551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 10990551 is about 3315.1999939672. The cubic root of 10990551 is about 222.3343108513.

The spelling of 10990551 in words is "ten million, nine hundred ninety thousand, five hundred fifty-one".