2115535541 has 4 divisors (see below), whose sum is σ = 2417754912. Its totient is φ = 1813316172.

The previous prime is 2115535501. The next prime is 2115535553. The reversal of 2115535541 is 1455355112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2115535541 - 2¹⁸ = 2115273397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2115535498 and 2115535507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115535501) 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, 151109675 + ... + 151109688.

It is an arithmetic number, because the mean of its divisors is an integer number (604438728).

Almost surely, 2^2115535541 is an apocalyptic number.

It is an amenable number.

2115535541 is a deficient number, since it is larger than the sum of its proper divisors (302219371).

2115535541 is an equidigital number, since it uses as much as digits as its factorization.

2115535541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302219370.

The product of its digits is 15000, while the sum is 32.

The square root of 2115535541 is about 45994.9512555454. The cubic root of 2115535541 is about 1283.7292652679.

The spelling of 2115535541 in words is "two billion, one hundred fifteen million, five hundred thirty-five thousand, five hundred forty-one".