2119551 has 8 divisors (see below), whose sum is σ = 3229824. Its totient is φ = 1211160.

The previous prime is 2119531. The next prime is 2119561. The reversal of 2119551 is 1559112.

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

It is not a de Polignac number, because 2119551 - 2⁶ = 2119487 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

2119551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2119511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50445 + ... + 50486.

It is an arithmetic number, because the mean of its divisors is an integer number (403728).

2^2119551 is an apocalyptic number.

2119551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2119551 is a deficient number, since it is larger than the sum of its proper divisors (1110273).

2119551 is a wasteful number, since it uses less digits than its factorization.

2119551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100941.

The product of its digits is 450, while the sum is 24.

The square root of 2119551 is about 1455.8677824583. The cubic root of 2119551 is about 128.4540959546.

The spelling of 2119551 in words is "two million, one hundred nineteen thousand, five hundred fifty-one".