25110521427 has 4 divisors (see below), whose sum is σ = 33480695240. Its totient is φ = 16740347616.

The previous prime is 25110521383. The next prime is 25110521431. The reversal of 25110521427 is 72412501152.

It is a happy number.

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

It is not a de Polignac number, because 25110521427 - 2¹⁹ = 25109997139 is a prime.

It is a super-2 number, since 2×25110521427² (a number of 22 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 = 25110521394 and 25110521403.

It is not an unprimeable number, because it can be changed into a prime (25110531427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4185086902 + ... + 4185086907.

It is an arithmetic number, because the mean of its divisors is an integer number (8370173810).

Almost surely, 2^25110521427 is an apocalyptic number.

25110521427 is a deficient number, since it is larger than the sum of its proper divisors (8370173813).

25110521427 is an equidigital number, since it uses as much as digits as its factorization.

25110521427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8370173812.

The product of its (nonzero) digits is 5600, while the sum is 30.

The spelling of 25110521427 in words is "twenty-five billion, one hundred ten million, five hundred twenty-one thousand, four hundred twenty-seven".