100561530 has 32 divisors (see below), whose sum is σ = 242305344. Its totient is φ = 26710016.

The previous prime is 100561507. The next prime is 100561553. The reversal of 100561530 is 35165001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100561507) and next prime (100561553).

It is a super-2 number, since 2×100561530² = 20225242631881800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100561497 and 100561506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189 + ... + 14231.

It is an arithmetic number, because the mean of its divisors is an integer number (7572042).

Almost surely, 2^100561530 is an apocalyptic number.

100561530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100561530 is an abundant number, since it is smaller than the sum of its proper divisors (141743814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100561530 is a wasteful number, since it uses less digits than its factorization.

100561530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13310.

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

The square root of 100561530 is about 10028.0371957826. The cubic root of 100561530 is about 465.0260593558.

The spelling of 100561530 in words is "one hundred million, five hundred sixty-one thousand, five hundred thirty".