101291232 has 144 divisors (see below), whose sum is σ = 315261072. Its totient is φ = 28385280.

The previous prime is 101291209. The next prime is 101291249. The reversal of 101291232 is 232192101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 101291199 and 101291208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286768 + ... + 287120.

It is an arithmetic number, because the mean of its divisors is an integer number (2189313).

Almost surely, 2^101291232 is an apocalyptic number.

101291232 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 101291232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157630536).

101291232 is an abundant number, since it is smaller than the sum of its proper divisors (213969840).

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

101291232 is a wasteful number, since it uses less digits than its factorization.

101291232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 101291232 is about 10064.3545247572. The cubic root of 101291232 is about 466.1481351640.

The spelling of 101291232 in words is "one hundred one million, two hundred ninety-one thousand, two hundred thirty-two".