11155345231 has 8 divisors (see below), whose sum is σ = 11430738144. Its totient is φ = 10880110080.

The previous prime is 11155345213. The next prime is 11155345249. The reversal of 11155345231 is 13254355111.

It is an interprime number because it is at equal distance from previous prime (11155345213) and next prime (11155345249).

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

It is a cyclic number.

It is not a de Polignac number, because 11155345231 - 2⁵ = 11155345199 is a prime.

It is a super-2 number, since 2×11155345231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11155345193 and 11155345202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155345631) 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, 110686 + ... + 185908.

It is an arithmetic number, because the mean of its divisors is an integer number (1428842268).

Almost surely, 2^11155345231 is an apocalyptic number.

11155345231 is a deficient number, since it is larger than the sum of its proper divisors (275392913).

11155345231 is an equidigital number, since it uses as much as digits as its factorization.

11155345231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78881.

The product of its digits is 9000, while the sum is 31.

The spelling of 11155345231 in words is "eleven billion, one hundred fifty-five million, three hundred forty-five thousand, two hundred thirty-one".