7812100530 has 96 divisors (see below), whose sum is σ = 22090788720. Its totient is φ = 1903910400.

The previous prime is 7812100493. The next prime is 7812100589. The reversal of 7812100530 is 350012187.

7812100530 is a `hidden beast` number, since 7 + 8 + 121 + 0 + 0 + 530 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4768040601 + 3044059929 = 69051^2 + 55173^2 .

It is a super-2 number, since 2×7812100530² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7812100494 and 7812100503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85116 + ... + 151224.

Almost surely, 2^7812100530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7812100530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11045394360).

7812100530 is an abundant number, since it is smaller than the sum of its proper divisors (14278688190).

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

7812100530 is a wasteful number, since it uses less digits than its factorization.

7812100530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66236 (or 66233 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 7812100530 is about 88386.0878758643. The cubic root of 7812100530 is about 1984.2174946986.

The spelling of 7812100530 in words is "seven billion, eight hundred twelve million, one hundred thousand, five hundred thirty".