100603551 has 8 divisors (see below), whose sum is σ = 134740480. Its totient is φ = 66767832.

The previous prime is 100603543. The next prime is 100603583. The reversal of 100603551 is 155306001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100603551 - 2³ = 100603543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100603051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74521 + ... + 75858.

It is an arithmetic number, because the mean of its divisors is an integer number (16842560).

Almost surely, 2^100603551 is an apocalyptic number.

100603551 is a deficient number, since it is larger than the sum of its proper divisors (34136929).

100603551 is a wasteful number, since it uses less digits than its factorization.

100603551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150605.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 100603551 is about 10030.1321526688. The cubic root of 100603551 is about 465.0908228191.

Adding to 100603551 its reverse (155306001), we get a palindrome (255909552).

The spelling of 100603551 in words is "one hundred million, six hundred three thousand, five hundred fifty-one".