45123212 has 12 divisors (see below), whose sum is σ = 79569336. Its totient is φ = 22389120.

The previous prime is 45123191. The next prime is 45123251. The reversal of 45123212 is 21232154.

It is a super-2 number, since 2×45123212² = 4072208522393888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42533 + ... + 43580.

It is an arithmetic number, because the mean of its divisors is an integer number (6630778).

Almost surely, 2^45123212 is an apocalyptic number.

It is an amenable number.

45123212 is a deficient number, since it is larger than the sum of its proper divisors (34446124).

45123212 is a wasteful number, since it uses less digits than its factorization.

45123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86248 (or 86246 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 45123212 is about 6717.3813350144. The cubic root of 45123212 is about 356.0136656792.

Adding to 45123212 its reverse (21232154), we get a palindrome (66355366).

The spelling of 45123212 in words is "forty-five million, one hundred twenty-three thousand, two hundred twelve".