100556145 has 48 divisors (see below), whose sum is σ = 180028992. Its totient is φ = 51891840.

The previous prime is 100556107. The next prime is 100556147. The reversal of 100556145 is 541655001.

It is a happy number.

100556145 is a `hidden beast` number, since 100 + 556 + 1 + 4 + 5 = 666.

It is not a de Polignac number, because 100556145 - 2⁶ = 100556081 is a prime.

It is a super-2 number, since 2×100556145² = 20223076594522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100556147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 303630 + ... + 303960.

It is an arithmetic number, because the mean of its divisors is an integer number (3750604).

Almost surely, 2^100556145 is an apocalyptic number.

100556145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100556145 is a deficient number, since it is larger than the sum of its proper divisors (79472847).

100556145 is a wasteful number, since it uses less digits than its factorization.

100556145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 100556145 is about 10027.7686949790. The cubic root of 100556145 is about 465.0177586003.

The spelling of 100556145 in words is "one hundred million, five hundred fifty-six thousand, one hundred forty-five".