45390181 has 8 divisors (see below), whose sum is σ = 45968384. Its totient is φ = 44815680.

The previous prime is 45390077. The next prime is 45390199. The reversal of 45390181 is 18109354.

45390181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45390181 - 2²⁵ = 11835749 is a prime.

It is a super-2 number, since 2×45390181² = 4120537062425522, 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 (45390581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29866 + ... + 31348.

It is an arithmetic number, because the mean of its divisors is an integer number (5746048).

Almost surely, 2^45390181 is an apocalyptic number.

It is an amenable number.

45390181 is a deficient number, since it is larger than the sum of its proper divisors (578203).

45390181 is a wasteful number, since it uses less digits than its factorization.

45390181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 45390181 is about 6737.2235379272. The cubic root of 45390181 is about 356.7143972962.

The spelling of 45390181 in words is "forty-five million, three hundred ninety thousand, one hundred eighty-one".