111521479 has 8 divisors (see below), whose sum is σ = 118985328. Its totient is φ = 104158080.

The previous prime is 111521471. The next prime is 111521537. The reversal of 111521479 is 974125111.

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 111521479 - 2³ = 111521471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111521479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111521471) 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, 22812 + ... + 27265.

It is an arithmetic number, because the mean of its divisors is an integer number (14873166).

Almost surely, 2^111521479 is an apocalyptic number.

111521479 is a deficient number, since it is larger than the sum of its proper divisors (7463849).

111521479 is a wasteful number, since it uses less digits than its factorization.

111521479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50225.

The product of its digits is 2520, while the sum is 31.

The square root of 111521479 is about 10560.3730521227. The cubic root of 111521479 is about 481.3409825396.

The spelling of 111521479 in words is "one hundred eleven million, five hundred twenty-one thousand, four hundred seventy-nine".