100231992 has 160 divisors (see below), whose sum is σ = 338025600. Its totient is φ = 27107136.

The previous prime is 100231987. The next prime is 100231997. The reversal of 100231992 is 299132001.

It is an interprime number because it is at equal distance from previous prime (100231987) and next prime (100231997).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100231997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85603 + ... + 86765.

It is an arithmetic number, because the mean of its divisors is an integer number (2112660).

Almost surely, 2^100231992 is an apocalyptic number.

100231992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100231992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169012800).

100231992 is an abundant number, since it is smaller than the sum of its proper divisors (237793608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100231992 is a wasteful number, since it uses less digits than its factorization.

100231992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 100231992 is about 10011.5928802564. The cubic root of 100231992 is about 464.5175433089.

Adding to 100231992 its reverse (299132001), we get a palindrome (399363993).

The spelling of 100231992 in words is "one hundred million, two hundred thirty-one thousand, nine hundred ninety-two".