45545381 has 4 divisors (see below), whose sum is σ = 52051872. Its totient is φ = 39038892.

The previous prime is 45545351. The next prime is 45545387. The reversal of 45545381 is 18354554.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18354554 = 2 ⋅9177277.

It is a cyclic number.

It is not a de Polignac number, because 45545381 - 2¹⁰ = 45544357 is a prime.

It is a super-2 number, since 2×45545381² = 4148763460870322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45545387) 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, 3253235 + ... + 3253248.

It is an arithmetic number, because the mean of its divisors is an integer number (13012968).

Almost surely, 2^45545381 is an apocalyptic number.

It is an amenable number.

45545381 is a deficient number, since it is larger than the sum of its proper divisors (6506491).

45545381 is an equidigital number, since it uses as much as digits as its factorization.

45545381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506490.

The product of its digits is 48000, while the sum is 35.

The square root of 45545381 is about 6748.7318067916. The cubic root of 45545381 is about 357.1204990423.

The spelling of 45545381 in words is "forty-five million, five hundred forty-five thousand, three hundred eighty-one".