105440220425 has 6 divisors (see below), whose sum is σ = 130745873358. Its totient is φ = 84352176320.

The previous prime is 105440220371. The next prime is 105440220427. The reversal of 105440220425 is 524022044501.

It can be written as a sum of positive squares in 3 ways, for example, as 16440624841 + 88999595584 = 128221^2 + 298328^2 .

It is not a de Polignac number, because 105440220425 - 2²² = 105436026121 is a prime.

It is a super-2 number, since 2×105440220425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105440220427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2108804384 + ... + 2108804433.

It is an arithmetic number, because the mean of its divisors is an integer number (21790978893).

Almost surely, 2^105440220425 is an apocalyptic number.

It is an amenable number.

105440220425 is a deficient number, since it is larger than the sum of its proper divisors (25305652933).

105440220425 is an equidigital number, since it uses as much as digits as its factorization.

105440220425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217608827 (or 4217608822 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 105440220425 its reverse (524022044501), we get a palindrome (629462264926).

The spelling of 105440220425 in words is "one hundred five billion, four hundred forty million, two hundred twenty thousand, four hundred twenty-five".