4551220040 has 32 divisors (see below), whose sum is σ = 10380529080. Its totient is φ = 1795548672.

The previous prime is 4551220033. The next prime is 4551220111. The reversal of 4551220040 is 400221554.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2604469156 + 1946750884 = 51034^2 + 44122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4551219988 and 4551220015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776399 + ... + 782238.

Almost surely, 2^4551220040 is an apocalyptic number.

4551220040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4551220040 is an abundant number, since it is smaller than the sum of its proper divisors (5829309040).

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

4551220040 is a wasteful number, since it uses less digits than its factorization.

4551220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558721 (or 1558717 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4551220040 is about 67462.7307481694. The cubic root of 4551220040 is about 1657.2038911188.

Adding to 4551220040 its reverse (400221554), we get a palindrome (4951441594).

The spelling of 4551220040 in words is "four billion, five hundred fifty-one million, two hundred twenty thousand, forty".