11503211351 has 8 divisors (see below), whose sum is σ = 11548849200. Its totient is φ = 11457617472.

The previous prime is 11503211243. The next prime is 11503211407. The reversal of 11503211351 is 15311230511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11503211351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503214351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574100 + ... + 593798.

It is an arithmetic number, because the mean of its divisors is an integer number (1443606150).

Almost surely, 2^11503211351 is an apocalyptic number.

11503211351 is a deficient number, since it is larger than the sum of its proper divisors (45637849).

11503211351 is a wasteful number, since it uses less digits than its factorization.

11503211351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21985.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 11503211351 its reverse (15311230511), we get a palindrome (26814441862).

The spelling of 11503211351 in words is "eleven billion, five hundred three million, two hundred eleven thousand, three hundred fifty-one".