5215555400 has 96 divisors (see below), whose sum is σ = 13330262880. Its totient is φ = 1881984000.

The previous prime is 5215555369. The next prime is 5215555421. The reversal of 5215555400 is 45555125.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279152 + ... + 297248.

It is an arithmetic number, because the mean of its divisors is an integer number (138856905).

Almost surely, 2^5215555400 is an apocalyptic number.

5215555400 is a gapful number since it is divisible by the number (50) 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 5215555400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6665131440).

5215555400 is an abundant number, since it is smaller than the sum of its proper divisors (8114707480).

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

5215555400 is a wasteful number, since it uses less digits than its factorization.

5215555400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18255 (or 18246 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 5215555400 is about 72218.8022609071. The cubic root of 5215555400 is about 1734.2040160526.

The spelling of 5215555400 in words is "five billion, two hundred fifteen million, five hundred fifty-five thousand, four hundred".