11215235425 has 12 divisors (see below), whose sum is σ = 13958598780. Its totient is φ = 8938829120.

The previous prime is 11215235419. The next prime is 11215235429. The reversal of 11215235425 is 52453251211.

It can be written as a sum of positive squares in 6 ways, for example, as 5320681249 + 5894554176 = 72943^2 + 76776^2 .

It is not a de Polignac number, because 11215235425 - 2⁹ = 11215234913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215235429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827122 + ... + 840571.

It is an arithmetic number, because the mean of its divisors is an integer number (1163216565).

Almost surely, 2^11215235425 is an apocalyptic number.

It is an amenable number.

11215235425 is a deficient number, since it is larger than the sum of its proper divisors (2743363355).

11215235425 is a wasteful number, since it uses less digits than its factorization.

11215235425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667972 (or 1667967 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

Adding to 11215235425 its reverse (52453251211), we get a palindrome (63668486636).

The spelling of 11215235425 in words is "eleven billion, two hundred fifteen million, two hundred thirty-five thousand, four hundred twenty-five".