11521510251 has 16 divisors (see below), whose sum is σ = 15860425728. Its totient is φ = 7431890400.

The previous prime is 11521510229. The next prime is 11521510277. The reversal of 11521510251 is 15201512511.

It is not a de Polignac number, because 11521510251 - 2⁷ = 11521510123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11521510201) 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, 932325 + ... + 944601.

It is an arithmetic number, because the mean of its divisors is an integer number (991276608).

Almost surely, 2^11521510251 is an apocalyptic number.

11521510251 is a deficient number, since it is larger than the sum of its proper divisors (4338915477).

11521510251 is a wasteful number, since it uses less digits than its factorization.

11521510251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22402.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 11521510251 in words is "eleven billion, five hundred twenty-one million, five hundred ten thousand, two hundred fifty-one".