111670551 has 12 divisors (see below), whose sum is σ = 165661912. Its totient is φ = 72434736.

The previous prime is 111670547. The next prime is 111670621. The reversal of 111670551 is 155076111.

It is a happy number.

It is not a de Polignac number, because 111670551 - 2² = 111670547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111670051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167341 + ... + 168006.

Almost surely, 2^111670551 is an apocalyptic number.

111670551 is a deficient number, since it is larger than the sum of its proper divisors (53991361).

111670551 is a wasteful number, since it uses less digits than its factorization.

111670551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335390 (or 335387 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The square root of 111670551 is about 10567.4287790361. The cubic root of 111670551 is about 481.5553583282. Note that the first 3 decimals are identical.

The spelling of 111670551 in words is "one hundred eleven million, six hundred seventy thousand, five hundred fifty-one".