100561857 has 16 divisors (see below), whose sum is σ = 146577600. Its totient is φ = 60819200.

The previous prime is 100561849. The next prime is 100561859. The reversal of 100561857 is 758165001.

It is a cyclic number.

It is not a de Polignac number, because 100561857 - 2³ = 100561849 is a prime.

It is a super-2 number, since 2×100561857² = 20225374166576898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (100561859) 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 in 15 ways as a sum of consecutive naturals, for example, 14269 + ... + 20117.

It is an arithmetic number, because the mean of its divisors is an integer number (9161100).

Almost surely, 2^100561857 is an apocalyptic number.

It is an amenable number.

100561857 is a deficient number, since it is larger than the sum of its proper divisors (46015743).

100561857 is a wasteful number, since it uses less digits than its factorization.

100561857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 100561857 is about 10028.0535000567. The cubic root of 100561857 is about 465.0265634033.

The spelling of 100561857 in words is "one hundred million, five hundred sixty-one thousand, eight hundred fifty-seven".