210232421505 has 48 divisors (see below), whose sum is σ = 382132604880. Its totient is φ = 106774585344.

The previous prime is 210232421473. The next prime is 210232421537. The reversal of 210232421505 is 505124232012.

210232421505 is a `hidden beast` number, since 2 + 1 + 0 + 232 + 421 + 5 + 0 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (210232421473) and next prime (210232421537).

It can be written as a sum of positive squares in 8 ways, for example, as 17156546289 + 193075875216 = 130983^2 + 439404^2 .

It is not a de Polignac number, because 210232421505 - 2⁵ = 210232421473 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1008144 + ... + 1198673.

It is an arithmetic number, because the mean of its divisors is an integer number (7961095935).

Almost surely, 2^210232421505 is an apocalyptic number.

It is an amenable number.

210232421505 is a deficient number, since it is larger than the sum of its proper divisors (171900183375).

210232421505 is a wasteful number, since it uses less digits than its factorization.

210232421505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206930 (or 2206927 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 210232421505 its reverse (505124232012), we get a palindrome (715356653517).

The spelling of 210232421505 in words is "two hundred ten billion, two hundred thirty-two million, four hundred twenty-one thousand, five hundred five".