101811992 has 16 divisors (see below), whose sum is σ = 191014200. Its totient is φ = 50874880.

The previous prime is 101811991. The next prime is 101812001. The reversal of 101811992 is 299118101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101811991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15992 + ... + 21432.

Almost surely, 2^101811992 is an apocalyptic number.

It is an amenable number.

101811992 is a deficient number, since it is larger than the sum of its proper divisors (89202208).

101811992 is a wasteful number, since it uses less digits than its factorization.

101811992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786 (or 7782 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 101811992 is about 10090.1928623788. The cubic root of 101811992 is about 466.9456259571.

The spelling of 101811992 in words is "one hundred one million, eight hundred eleven thousand, nine hundred ninety-two".