45121219 has 16 divisors (see below), whose sum is σ = 55802880. Its totient is φ = 35868960.

The previous prime is 45121211. The next prime is 45121231. The reversal of 45121219 is 91212154.

It is a happy number.

It is not a de Polignac number, because 45121219 - 2³ = 45121211 is a prime.

It is a super-2 number, since 2×45121219² = 4071848808091922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45121193 and 45121202.

It is not an unprimeable number, because it can be changed into a prime (45121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5587 + ... + 11020.

It is an arithmetic number, because the mean of its divisors is an integer number (3487680).

Almost surely, 2^45121219 is an apocalyptic number.

45121219 is a deficient number, since it is larger than the sum of its proper divisors (10681661).

45121219 is a wasteful number, since it uses less digits than its factorization.

45121219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650.

The product of its digits is 720, while the sum is 25.

The square root of 45121219 is about 6717.2329868779. The cubic root of 45121219 is about 356.0084241368.

The spelling of 45121219 in words is "forty-five million, one hundred twenty-one thousand, two hundred nineteen".