101605851 has 12 divisors (see below), whose sum is σ = 148278312. Its totient is φ = 67038336.

The previous prime is 101605807. The next prime is 101605859. The reversal of 101605851 is 158506101.

101605851 is a `hidden beast` number, since 1 + 0 + 1 + 605 + 8 + 51 = 666.

It is not a de Polignac number, because 101605851 - 2⁷ = 101605723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101605859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57321 + ... + 59066.

It is an arithmetic number, because the mean of its divisors is an integer number (12356526).

Almost surely, 2^101605851 is an apocalyptic number.

101605851 is a deficient number, since it is larger than the sum of its proper divisors (46672461).

101605851 is a wasteful number, since it uses less digits than its factorization.

101605851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116490 (or 116487 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 101605851 is about 10079.9727678204. The cubic root of 101605851 is about 466.6302679661.

The spelling of 101605851 in words is "one hundred one million, six hundred five thousand, eight hundred fifty-one".