11051431505 has 16 divisors (see below), whose sum is σ = 14038073280. Its totient is φ = 8337755328.

The previous prime is 11051431499. The next prime is 11051431507. The reversal of 11051431505 is 50513415011.

It is a cyclic number.

It is not a de Polignac number, because 11051431505 - 2⁶ = 11051431441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11051431507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880007 + ... + 892476.

It is an arithmetic number, because the mean of its divisors is an integer number (877379580).

Almost surely, 2^11051431505 is an apocalyptic number.

It is an amenable number.

11051431505 is a deficient number, since it is larger than the sum of its proper divisors (2986641775).

11051431505 is a wasteful number, since it uses less digits than its factorization.

11051431505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772560.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 11051431505 its reverse (50513415011), we get a palindrome (61564846516).

The spelling of 11051431505 in words is "eleven billion, fifty-one million, four hundred thirty-one thousand, five hundred five".