2261169541 has 4 divisors (see below), whose sum is σ = 2394179532. Its totient is φ = 2128159552.

The previous prime is 2261169509. The next prime is 2261169563. The reversal of 2261169541 is 1459611622.

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 1826280225 + 434889316 = 42735^2 + 20854^2 .

It is not a de Polignac number, because 2261169541 - 2⁵ = 2261169509 is a prime.

It is a super-2 number, since 2×2261169541² = 10225775386292301362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261169541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261160541) 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, 66504970 + ... + 66505003.

It is an arithmetic number, because the mean of its divisors is an integer number (598544883).

Almost surely, 2^2261169541 is an apocalyptic number.

It is an amenable number.

2261169541 is a deficient number, since it is larger than the sum of its proper divisors (133009991).

2261169541 is a wasteful number, since it uses less digits than its factorization.

2261169541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133009990.

The product of its digits is 25920, while the sum is 37.

The square root of 2261169541 is about 47551.7564449516. The cubic root of 2261169541 is about 1312.5354506645.

The spelling of 2261169541 in words is "two billion, two hundred sixty-one million, one hundred sixty-nine thousand, five hundred forty-one".