100551045 has 32 divisors (see below), whose sum is σ = 186992640. Its totient is φ = 45184320.

The previous prime is 100551041. The next prime is 100551079. The reversal of 100551045 is 540155001.

It is not a de Polignac number, because 100551045 - 2² = 100551041 is a prime.

It is a super-2 number, since 2×100551045² = 20221025301184050, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100551041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1921 + ... + 14310.

It is an arithmetic number, because the mean of its divisors is an integer number (5843520).

Almost surely, 2^100551045 is an apocalyptic number.

100551045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100551045 is a deficient number, since it is larger than the sum of its proper divisors (86441595).

100551045 is a wasteful number, since it uses less digits than its factorization.

100551045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16305.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 100551045 is about 10027.5143978954. The cubic root of 100551045 is about 465.0098968873.

The spelling of 100551045 in words is "one hundred million, five hundred fifty-one thousand, forty-five".