11383782531 has 16 divisors (see below), whose sum is σ = 17429715840. Its totient is φ = 6536142720.

The previous prime is 11383782523. The next prime is 11383782559. The reversal of 11383782531 is 13528738311.

It is a happy number.

It is not a de Polignac number, because 11383782531 - 2³ = 11383782523 is a prime.

It is a super-2 number, since 2×11383782531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11383780531) 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, 9077350 + ... + 9078603.

It is an arithmetic number, because the mean of its divisors is an integer number (1089357240).

Almost surely, 2^11383782531 is an apocalyptic number.

11383782531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11383782531 is a deficient number, since it is larger than the sum of its proper divisors (6045933309).

11383782531 is a wasteful number, since it uses less digits than its factorization.

11383782531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18155986.

The product of its digits is 120960, while the sum is 42.

The spelling of 11383782531 in words is "eleven billion, three hundred eighty-three million, seven hundred eighty-two thousand, five hundred thirty-one".