101661255 has 12 divisors (see below), whose sum is σ = 176212920. Its totient is φ = 54219312.

The previous prime is 101661253. The next prime is 101661289. The reversal of 101661255 is 552166101.

It is a happy number.

It is not a de Polignac number, because 101661255 - 2¹ = 101661253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101661251) 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, 1129525 + ... + 1129614.

It is an arithmetic number, because the mean of its divisors is an integer number (14684410).

Almost surely, 2^101661255 is an apocalyptic number.

101661255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101661255 is a deficient number, since it is larger than the sum of its proper divisors (74551665).

101661255 is a wasteful number, since it uses less digits than its factorization.

101661255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259150 (or 2259147 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 101661255 is about 10082.7206149928. The cubic root of 101661255 is about 466.7150678256.

The spelling of 101661255 in words is "one hundred one million, six hundred sixty-one thousand, two hundred fifty-five".