45219866 has 4 divisors (see below), whose sum is σ = 67829802. Its totient is φ = 22609932.

The previous prime is 45219851. The next prime is 45219869. The reversal of 45219866 is 66891254.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 36954241 + 8265625 = 6079^2 + 2875^2 .

It is not an unprimeable number, because it can be changed into a prime (45219869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11304965 + ... + 11304968.

Almost surely, 2^45219866 is an apocalyptic number.

45219866 is a deficient number, since it is larger than the sum of its proper divisors (22609936).

45219866 is a wasteful number, since it uses less digits than its factorization.

45219866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22609935.

The product of its digits is 103680, while the sum is 41.

The square root of 45219866 is about 6724.5718079295. The cubic root of 45219866 is about 356.2676783676.

The spelling of 45219866 in words is "forty-five million, two hundred nineteen thousand, eight hundred sixty-six".