11531003425 has 24 divisors (see below), whose sum is σ = 14952685824. Its totient is φ = 8804463360.

The previous prime is 11531003399. The next prime is 11531003431. The reversal of 11531003425 is 52430013511.

It is a happy number.

It is not a de Polignac number, because 11531003425 - 2¹³ = 11530995233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11531003425.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244569 + ... + 287881.

It is an arithmetic number, because the mean of its divisors is an integer number (623028576).

Almost surely, 2^11531003425 is an apocalyptic number.

It is an amenable number.

11531003425 is a deficient number, since it is larger than the sum of its proper divisors (3421682399).

11531003425 is a wasteful number, since it uses less digits than its factorization.

11531003425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43809 (or 43804 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 11531003425 its reverse (52430013511), we get a palindrome (63961016936).

The spelling of 11531003425 in words is "eleven billion, five hundred thirty-one million, three thousand, four hundred twenty-five".