210561314154361 has 3 divisors (see below), whose sum is σ = 210561328665093. Its totient is φ = 210561299643630.

The previous prime is 210561314154349. The next prime is 210561314154479. The reversal of 210561314154361 is 163451413165012.

The square root of 210561314154361 is 14510731.

It is a perfect power (a square), and thus also a powerful number.

210561314154361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 210561314154361 - 2⁹ = 210561314153849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210561314154311) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7255366 + ... + 21766096.

It is an arithmetic number, because the mean of its divisors is an integer number (70187109555031).

Almost surely, 2^{210561314154361} is an apocalyptic number.

210561314154361 is the 14510731-st square number.

210561314154361 is the 7255366-th centered octagonal number.

It is an amenable number.

210561314154361 is a deficient number, since it is larger than the sum of its proper divisors (14510732).

210561314154361 is an frugal number, since it uses more digits than its factorization.

210561314154361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29021462 (or 14510731 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 210561314154361 in words is "two hundred ten trillion, five hundred sixty-one billion, three hundred fourteen million, one hundred fifty-four thousand, three hundred sixty-one".