45221040 has 120 divisors (see below), whose sum is σ = 153146448. Its totient is φ = 11957760.

The previous prime is 45221023. The next prime is 45221041. The reversal of 45221040 is 4012254.

45221040 is a `hidden beast` number, since 452 + 210 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (45221041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130147 + ... + 130493.

Almost surely, 2^45221040 is an apocalyptic number.

45221040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76573224).

45221040 is an abundant number, since it is smaller than the sum of its proper divisors (107925408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45221040 is a wasteful number, since it uses less digits than its factorization.

45221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 45221040 is about 6724.6590991663. The cubic root of 45221040 is about 356.2707614863.

Adding to 45221040 its reverse (4012254), we get a palindrome (49233294).

The spelling of 45221040 in words is "forty-five million, two hundred twenty-one thousand, forty".