1000211500 has 24 divisors (see below), whose sum is σ = 2184463008. Its totient is φ = 400084400.

The previous prime is 1000211489. The next prime is 1000211501. The reversal of 1000211500 is 51120001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1000211501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999712 + ... + 1000711.

It is an arithmetic number, because the mean of its divisors is an integer number (91019292).

Almost surely, 2^1000211500 is an apocalyptic number.

1000211500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000211500 is an abundant number, since it is smaller than the sum of its proper divisors (1184251508).

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

1000211500 is a wasteful number, since it uses less digits than its factorization.

1000211500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000442 (or 2000430 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 1000211500 is about 31626.1205335084. The cubic root of 1000211500 is about 1000.0704950303.

Adding to 1000211500 its reverse (51120001), we get a palindrome (1051331501).

The spelling of 1000211500 in words is "one billion, two hundred eleven thousand, five hundred".