11201541551 has 4 divisors (see below), whose sum is σ = 11209045752. Its totient is φ = 11194037352.

The previous prime is 11201541539. The next prime is 11201541623. The reversal of 11201541551 is 15514510211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11201541551 - 2⁶ = 11201541487 is a prime.

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 11201541551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201541511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3749861 + ... + 3752846.

It is an arithmetic number, because the mean of its divisors is an integer number (2802261438).

Almost surely, 2^11201541551 is an apocalyptic number.

11201541551 is a deficient number, since it is larger than the sum of its proper divisors (7504201).

11201541551 is an equidigital number, since it uses as much as digits as its factorization.

11201541551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504200.

The product of its (nonzero) digits is 1000, while the sum is 26.

The spelling of 11201541551 in words is "eleven billion, two hundred one million, five hundred forty-one thousand, five hundred fifty-one".