4551215400 has 144 divisors (see below), whose sum is σ = 15777740160. Its totient is φ = 1174492800.

The previous prime is 4551215399. The next prime is 4551215447. The reversal of 4551215400 is 45121554.

4551215400 is a `hidden beast` number, since 45 + 5 + 1 + 215 + 400 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15019 + ... + 96581.

It is an arithmetic number, because the mean of its divisors is an integer number (109567640).

Almost surely, 2^4551215400 is an apocalyptic number.

4551215400 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 4551215400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7888870080).

4551215400 is an abundant number, since it is smaller than the sum of its proper divisors (11226524760).

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

4551215400 is a wasteful number, since it uses less digits than its factorization.

4551215400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81616 (or 81604 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4551215400 is about 67462.6963588026. The cubic root of 4551215400 is about 1657.2033279417.

Adding to 4551215400 its reverse (45121554), we get a palindrome (4596336954).

The spelling of 4551215400 in words is "four billion, five hundred fifty-one million, two hundred fifteen thousand, four hundred".