85305525251 has 4 divisors (see below), whose sum is σ = 85348632600. Its totient is φ = 85262417904.

The previous prime is 85305525197. The next prime is 85305525257. The reversal of 85305525251 is 15252550358.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85305525251 - 2¹⁴ = 85305508867 is a prime.

It is a super-2 number, since 2×85305525251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85305525199 and 85305525208.

It is not an unprimeable number, because it can be changed into a prime (85305525257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21550706 + ... + 21554663.

It is an arithmetic number, because the mean of its divisors is an integer number (21337158150).

Almost surely, 2^85305525251 is an apocalyptic number.

85305525251 is a deficient number, since it is larger than the sum of its proper divisors (43107349).

85305525251 is a wasteful number, since it uses less digits than its factorization.

85305525251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43107348.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 85305525251 in words is "eighty-five billion, three hundred five million, five hundred twenty-five thousand, two hundred fifty-one".