11251557523 has 4 divisors (see below), whose sum is σ = 11332504120. Its totient is φ = 11170610928.

The previous prime is 11251557521. The next prime is 11251557529. The reversal of 11251557523 is 32575515211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32575515211 = 77419 ⋅420769.

It is a cyclic number.

It is not a de Polignac number, because 11251557523 - 2¹ = 11251557521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11251557521) 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, 40473090 + ... + 40473367.

It is an arithmetic number, because the mean of its divisors is an integer number (2833126030).

Almost surely, 2^11251557523 is an apocalyptic number.

11251557523 is a deficient number, since it is larger than the sum of its proper divisors (80946597).

11251557523 is an equidigital number, since it uses as much as digits as its factorization.

11251557523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80946596.

The product of its digits is 52500, while the sum is 37.

The spelling of 11251557523 in words is "eleven billion, two hundred fifty-one million, five hundred fifty-seven thousand, five hundred twenty-three".