2151610000 has 50 divisors (see below), whose sum is σ = 5209287182. Its totient is φ = 860640000.

The previous prime is 2151609991. The next prime is 2151610009. The reversal of 2151610000 is 161512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2151609991) and next prime (2151610009).

It can be written as a sum of positive squares in 5 ways, for example, as 437981184 + 1713628816 = 20928^2 + 41396^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2151610009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 97581 + ... + 117580.

Almost surely, 2^2151610000 is an apocalyptic number.

2151610000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151610000 is an abundant number, since it is smaller than the sum of its proper divisors (3057677182).

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

2151610000 is an equidigital number, since it uses as much as digits as its factorization.

2151610000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215189 (or 215168 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2151610000 is about 46385.4503050256. The cubic root of 2151610000 is about 1290.9849657542.

Adding to 2151610000 its reverse (161512), we get a palindrome (2151771512).

The spelling of 2151610000 in words is "two billion, one hundred fifty-one million, six hundred ten thousand".