21507526160051 has 2 divisors, whose sum is σ = 21507526160052. Its totient is φ = 21507526160050.

The previous prime is 21507526160047. The next prime is 21507526160077. The reversal of 21507526160051 is 15006162570512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21507526160051 - 2² = 21507526160047 is a prime.

It is a super-2 number, since 2×21507526160051² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21507526159990 and 21507526160008.

It is not a weakly prime, because it can be changed into another prime (21507526160041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753763080025 + 10753763080026.

It is an arithmetic number, because the mean of its divisors is an integer number (10753763080026).

Almost surely, 2^{21507526160051} is an apocalyptic number.

21507526160051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507526160051 is an equidigital number, since it uses as much as digits as its factorization.

21507526160051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 21507526160051 in words is "twenty-one trillion, five hundred seven billion, five hundred twenty-six million, one hundred sixty thousand, fifty-one".