100551243 has 32 divisors (see below), whose sum is σ = 156473856. Its totient is φ = 56867328.

The previous prime is 100551203. The next prime is 100551247. The reversal of 100551243 is 342155001.

It is not a de Polignac number, because 100551243 - 2⁶ = 100551179 is a prime.

It is a super-2 number, since 2×100551243² = 20221104937690098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100551247) 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, 26746 + ... + 30272.

It is an arithmetic number, because the mean of its divisors is an integer number (4889808).

Almost surely, 2^100551243 is an apocalyptic number.

100551243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100551243 is a deficient number, since it is larger than the sum of its proper divisors (55922613).

100551243 is a wasteful number, since it uses less digits than its factorization.

100551243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 100551243 is about 10027.5242707260. The cubic root of 100551243 is about 465.0102021117.

The spelling of 100551243 in words is "one hundred million, five hundred fifty-one thousand, two hundred forty-three".