2190205541 has 4 divisors (see below), whose sum is σ = 2265729900. Its totient is φ = 2114681184.

The previous prime is 2190205519. The next prime is 2190205547. The reversal of 2190205541 is 1455020912.

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 451732516 + 1738473025 = 21254^2 + 41695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190205541 - 2³⁰ = 1116463717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 75524329 = 2190205541 / (2 + 1 + 9 + 0 + 2 + 0 + 5 + 5 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190205547) 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, 37762136 + ... + 37762193.

It is an arithmetic number, because the mean of its divisors is an integer number (566432475).

Almost surely, 2^2190205541 is an apocalyptic number.

It is an amenable number.

2190205541 is a deficient number, since it is larger than the sum of its proper divisors (75524359).

2190205541 is an equidigital number, since it uses as much as digits as its factorization.

2190205541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75524358.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2190205541 is about 46799.6318468426. The cubic root of 2190205541 is about 1298.6584861425.

The spelling of 2190205541 in words is "two billion, one hundred ninety million, two hundred five thousand, five hundred forty-one".