2155524919 has 4 divisors (see below), whose sum is σ = 2157490944. Its totient is φ = 2153558896.

The previous prime is 2155524881. The next prime is 2155524929. The reversal of 2155524919 is 9194255512.

It is a happy number.

2155524919 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 2155524919 - 2¹⁵ = 2155492151 is a prime.

It is a super-2 number, since 2×2155524919² = 9292575352859913122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155524929) 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, 981367 + ... + 983560.

It is an arithmetic number, because the mean of its divisors is an integer number (539372736).

Almost surely, 2^2155524919 is an apocalyptic number.

2155524919 is a deficient number, since it is larger than the sum of its proper divisors (1966025).

2155524919 is a wasteful number, since it uses less digits than its factorization.

2155524919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966024.

The product of its digits is 162000, while the sum is 43.

The square root of 2155524919 is about 46427.6309862995. The cubic root of 2155524919 is about 1291.7674866421.

The spelling of 2155524919 in words is "two billion, one hundred fifty-five million, five hundred twenty-four thousand, nine hundred nineteen".