11285994531 has 12 divisors (see below), whose sum is σ = 17504808072. Its totient is φ = 6449139648.

The previous prime is 11285994491. The next prime is 11285994557. The reversal of 11285994531 is 13549958211.

It is not a de Polignac number, because 11285994531 - 2¹⁴ = 11285978147 is a prime.

It is a super-2 number, since 2×11285994531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11285994331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38387590 + ... + 38387883.

It is an arithmetic number, because the mean of its divisors is an integer number (1458734006).

Almost surely, 2^11285994531 is an apocalyptic number.

11285994531 is a deficient number, since it is larger than the sum of its proper divisors (6218813541).

11285994531 is an equidigital number, since it uses as much as digits as its factorization.

11285994531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76775490 (or 76775483 counting only the distinct ones).

The product of its digits is 388800, while the sum is 48.

The spelling of 11285994531 in words is "eleven billion, two hundred eighty-five million, nine hundred ninety-four thousand, five hundred thirty-one".