111131397 has 48 divisors (see below), whose sum is σ = 186338880. Its totient is φ = 63207936.

The previous prime is 111131369. The next prime is 111131429. The reversal of 111131397 is 793131111.

It is not a de Polignac number, because 111131397 - 2⁶ = 111131333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111131397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116878 + ... + 117824.

It is an arithmetic number, because the mean of its divisors is an integer number (3882060).

Almost surely, 2^111131397 is an apocalyptic number.

111131397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111131397 is a deficient number, since it is larger than the sum of its proper divisors (75207483).

111131397 is a wasteful number, since it uses less digits than its factorization.

111131397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1039 counting only the distinct ones).

The product of its digits is 567, while the sum is 27.

The square root of 111131397 is about 10541.8877341774. The cubic root of 111131397 is about 480.7791123033.

The spelling of 111131397 in words is "one hundred eleven million, one hundred thirty-one thousand, three hundred ninety-seven".