45521839 has 4 divisors (see below), whose sum is σ = 49660200. Its totient is φ = 41383480.

The previous prime is 45521837. The next prime is 45521873. The reversal of 45521839 is 93812554.

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

It is a cyclic number.

It is not a de Polignac number, because 45521839 - 2¹ = 45521837 is a prime.

It is a super-3 number, since 3×45521839³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45521798 and 45521807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45521831) 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, 2069164 + ... + 2069185.

It is an arithmetic number, because the mean of its divisors is an integer number (12415050).

Almost surely, 2^45521839 is an apocalyptic number.

45521839 is a deficient number, since it is larger than the sum of its proper divisors (4138361).

45521839 is a wasteful number, since it uses less digits than its factorization.

45521839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138360.

The product of its digits is 43200, while the sum is 37.

The square root of 45521839 is about 6746.9874017964. The cubic root of 45521839 is about 357.0589576406.

It can be divided in two parts, 45521 and 839, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 45521839 in words is "forty-five million, five hundred twenty-one thousand, eight hundred thirty-nine".