100142244 has 72 divisors (see below), whose sum is σ = 264176640. Its totient is φ = 33169824.

The previous prime is 100142233. The next prime is 100142267. The reversal of 100142244 is 442241001.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 261277 + ... + 261659.

It is an arithmetic number, because the mean of its divisors is an integer number (3669120).

Almost surely, 2^100142244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100142244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132088320).

100142244 is an abundant number, since it is smaller than the sum of its proper divisors (164034396).

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

100142244 is a wasteful number, since it uses less digits than its factorization.

100142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 100142244 is about 10007.1096726278. The cubic root of 100142244 is about 464.3788584811.

Adding to 100142244 its reverse (442241001), we get a palindrome (542383245).

The spelling of 100142244 in words is "one hundred million, one hundred forty-two thousand, two hundred forty-four".