1000215552 has 176 divisors, whose sum is σ = 3075281792. Its totient is φ = 283115520.

The previous prime is 1000215533. The next prime is 1000215577. The reversal of 1000215552 is 2555120001.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4150152 + ... + 4150392.

It is an arithmetic number, because the mean of its divisors is an integer number (17473192).

Almost surely, 2^1000215552 is an apocalyptic number.

1000215552 is a gapful number since it is divisible by the number (12) 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 1000215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537640896).

1000215552 is an abundant number, since it is smaller than the sum of its proper divisors (2075066240).

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

1000215552 is a wasteful number, since it uses less digits than its factorization.

1000215552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1000215552 is about 31626.1845944148. The cubic root of 1000215552 is about 1000.0718455048.

Adding to 1000215552 its reverse (2555120001), we get a palindrome (3555335553).

The spelling of 1000215552 in words is "one billion, two hundred fifteen thousand, five hundred fifty-two".