100218542 has 4 divisors (see below), whose sum is σ = 150327816. Its totient is φ = 50109270.

The previous prime is 100218541. The next prime is 100218551. The reversal of 100218542 is 245812001.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100218541) 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 as a sum of consecutive naturals, namely, 25054634 + ... + 25054637.

It is an arithmetic number, because the mean of its divisors is an integer number (37581954).

Almost surely, 2^100218542 is an apocalyptic number.

100218542 is a deficient number, since it is larger than the sum of its proper divisors (50109274).

100218542 is an equidigital number, since it uses as much as digits as its factorization.

100218542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50109273.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 100218542 is about 10010.9211364389. The cubic root of 100218542 is about 464.4967647121.

The spelling of 100218542 in words is "one hundred million, two hundred eighteen thousand, five hundred forty-two".