11522985531 has 8 divisors (see below), whose sum is σ = 15366157824. Its totient is φ = 7680901800.

The previous prime is 11522985527. The next prime is 11522985547. The reversal of 11522985531 is 13558922511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11522985531 - 2² = 11522985527 is a prime.

It is a super-2 number, since 2×11522985531² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11522985511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247111 + ... + 290016.

It is an arithmetic number, because the mean of its divisors is an integer number (1920769728).

Almost surely, 2^11522985531 is an apocalyptic number.

11522985531 is a deficient number, since it is larger than the sum of its proper divisors (3843172293).

11522985531 is an equidigital number, since it uses as much as digits as its factorization.

11522985531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544281.

The product of its digits is 108000, while the sum is 42.

The spelling of 11522985531 in words is "eleven billion, five hundred twenty-two million, nine hundred eighty-five thousand, five hundred thirty-one".