2155504541 has 4 divisors (see below), whose sum is σ = 2196174492. Its totient is φ = 2114834592.

The previous prime is 2155504537. The next prime is 2155504543. The reversal of 2155504541 is 1454055512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 575760025 + 1579744516 = 23995^2 + 39746^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155504541 - 2² = 2155504537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155504498 and 2155504507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155504543) 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, 20334896 + ... + 20335001.

It is an arithmetic number, because the mean of its divisors is an integer number (549043623).

Almost surely, 2^2155504541 is an apocalyptic number.

It is an amenable number.

2155504541 is a deficient number, since it is larger than the sum of its proper divisors (40669951).

2155504541 is an equidigital number, since it uses as much as digits as its factorization.

2155504541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40669950.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 2155504541 is about 46427.4115259509. The cubic root of 2155504541 is about 1291.7634159058.

The spelling of 2155504541 in words is "two billion, one hundred fifty-five million, five hundred four thousand, five hundred forty-one".