100015542 has 24 divisors (see below), whose sum is σ = 236400840. Its totient is φ = 30307680.

The previous prime is 100015537. The next prime is 100015543. The reversal of 100015542 is 245510001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100015543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252367 + ... + 252762.

It is an arithmetic number, because the mean of its divisors is an integer number (9850035).

Almost surely, 2^100015542 is an apocalyptic number.

100015542 is an abundant number, since it is smaller than the sum of its proper divisors (136385298).

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

100015542 is a wasteful number, since it uses less digits than its factorization.

100015542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505148 (or 505145 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 100015542 is about 10000.7770698081. Note that the first 3 decimals coincide. The cubic root of 100015542 is about 464.1829286402.

Adding to 100015542 its reverse (245510001), we get a palindrome (345525543).

The spelling of 100015542 in words is "one hundred million, fifteen thousand, five hundred forty-two".