210113505 has 48 divisors (see below), whose sum is σ = 429671424. Its totient is φ = 92949120.

The previous prime is 210113483. The next prime is 210113507. The reversal of 210113505 is 505311012.

It is not a de Polignac number, because 210113505 - 2⁵ = 210113473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210113507) 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, 994 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (8951488).

Almost surely, 2^210113505 is an apocalyptic number.

It is an amenable number.

210113505 is an abundant number, since it is smaller than the sum of its proper divisors (219557919).

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

210113505 is a wasteful number, since it uses less digits than its factorization.

210113505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21566 (or 21563 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 210113505 is about 14495.2925117088. The cubic root of 210113505 is about 594.4992656486.

Adding to 210113505 its reverse (505311012), we get a palindrome (715424517).

The spelling of 210113505 in words is "two hundred ten million, one hundred thirteen thousand, five hundred five".