45541819 has 4 divisors (see below), whose sum is σ = 45900544. Its totient is φ = 45183096.

The previous prime is 45541799. The next prime is 45541823. The reversal of 45541819 is 91814554.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45541819 is a prime.

It is a super-2 number, since 2×45541819² = 4148114555657522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45541829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179172 + ... + 179425.

It is an arithmetic number, because the mean of its divisors is an integer number (11475136).

Almost surely, 2^45541819 is an apocalyptic number.

45541819 is a deficient number, since it is larger than the sum of its proper divisors (358725).

45541819 is a wasteful number, since it uses less digits than its factorization.

45541819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358724.

The product of its digits is 28800, while the sum is 37.

The square root of 45541819 is about 6748.4679001978. The cubic root of 45541819 is about 357.1111889406. Note that the first 4 decimals are identical.

It can be divided in two parts, 45541 and 819, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 45541819 in words is "forty-five million, five hundred forty-one thousand, eight hundred nineteen".