111551401 has 8 divisors (see below), whose sum is σ = 120929984. Its totient is φ = 102286800.

The previous prime is 111551353. The next prime is 111551507. The reversal of 111551401 is 104155111.

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 111551401 - 2¹⁵ = 111518633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111551701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26451 + ... + 30376.

It is an arithmetic number, because the mean of its divisors is an integer number (15116248).

Almost surely, 2^111551401 is an apocalyptic number.

It is an amenable number.

111551401 is a deficient number, since it is larger than the sum of its proper divisors (9378583).

111551401 is a wasteful number, since it uses less digits than its factorization.

111551401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56991.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 111551401 is about 10561.7896684227. The cubic root of 111551401 is about 481.3840277511.

The spelling of 111551401 in words is "one hundred eleven million, five hundred fifty-one thousand, four hundred one".