11528140251 has 4 divisors (see below), whose sum is σ = 15370853672. Its totient is φ = 7685426832.

The previous prime is 11528140243. The next prime is 11528140259. The reversal of 11528140251 is 15204182511.

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

It is an interprime number because it is at equal distance from previous prime (11528140243) and next prime (11528140259).

It is not a de Polignac number, because 11528140251 - 2³ = 11528140243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11528140259) 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, 1921356706 + ... + 1921356711.

It is an arithmetic number, because the mean of its divisors is an integer number (3842713418).

Almost surely, 2^11528140251 is an apocalyptic number.

11528140251 is a deficient number, since it is larger than the sum of its proper divisors (3842713421).

11528140251 is an equidigital number, since it uses as much as digits as its factorization.

11528140251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842713420.

The product of its (nonzero) digits is 3200, while the sum is 30.

The spelling of 11528140251 in words is "eleven billion, five hundred twenty-eight million, one hundred forty thousand, two hundred fifty-one".