210510130245561 has 24 divisors (see below), whose sum is σ = 307751595634496. Its totient is φ = 138647448485280.

The previous prime is 210510130245551. The next prime is 210510130245563. The reversal of 210510130245561 is 165542031015012.

210510130245561 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 10 + 130 + 2 + 455 + 61 = 666.

It is not a de Polignac number, because 210510130245561 - 2¹³ = 210510130237369 is a prime.

It is a super-2 number, since 2×210510130245561² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210510130245563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269309875 + ... + 270090408.

Almost surely, 2^{210510130245561} is an apocalyptic number.

It is an amenable number.

210510130245561 is a deficient number, since it is larger than the sum of its proper divisors (97241465388935).

210510130245561 is a wasteful number, since it uses less digits than its factorization.

210510130245561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539400813 (or 539400810 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 210510130245561 in words is "two hundred ten trillion, five hundred ten billion, one hundred thirty million, two hundred forty-five thousand, five hundred sixty-one".