45019881 has 12 divisors (see below), whose sum is σ = 67437552. Its totient is φ = 30013092.

The previous prime is 45019867. The next prime is 45019939. The reversal of 45019881 is 18891054.

It is not a de Polignac number, because 45019881 - 2⁶ = 45019817 is a prime.

It is a super-2 number, since 2×45019881² = 4053579370508322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45019811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92391 + ... + 92876.

It is an arithmetic number, because the mean of its divisors is an integer number (5619796).

Almost surely, 2^45019881 is an apocalyptic number.

It is an amenable number.

45019881 is a deficient number, since it is larger than the sum of its proper divisors (22417671).

45019881 is an equidigital number, since it uses as much as digits as its factorization.

45019881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185282 (or 185270 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 45019881 is about 6709.6856111147. The cubic root of 45019881 is about 355.7417039190.

The spelling of 45019881 in words is "forty-five million, nineteen thousand, eight hundred eighty-one".