11980551 has 8 divisors (see below), whose sum is σ = 17426304. Its totient is φ = 7260920.

The previous prime is 11980547. The next prime is 11980559. The reversal of 11980551 is 15508911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11980551 - 2² = 11980547 is a prime.

It is a super-4 number, since 4×11980551⁴ (a number of 29 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11980559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181491 + ... + 181556.

It is an arithmetic number, because the mean of its divisors is an integer number (2178288).

Almost surely, 2^11980551 is an apocalyptic number.

11980551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11980551 is a deficient number, since it is larger than the sum of its proper divisors (5445753).

11980551 is a wasteful number, since it uses less digits than its factorization.

11980551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363061.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 11980551 is about 3461.2932554177. The cubic root of 11980551 is about 228.8190952550.

The spelling of 11980551 in words is "eleven million, nine hundred eighty thousand, five hundred fifty-one".