210040135404251 has 8 divisors (see below), whose sum is σ = 227819716450704. Its totient is φ = 192863252020480.

The previous prime is 210040135404161. The next prime is 210040135404259. The reversal of 210040135404251 is 152404531040012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210040135404251 - 2¹⁴ = 210040135387867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210040135404259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150674414945 + ... + 150674416338.

It is an arithmetic number, because the mean of its divisors is an integer number (28477464556338).

Almost surely, 2^{210040135404251} is an apocalyptic number.

210040135404251 is a deficient number, since it is larger than the sum of its proper divisors (17779581046453).

210040135404251 is a wasteful number, since it uses less digits than its factorization.

210040135404251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301348831341.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 210040135404251 its reverse (152404531040012), we get a palindrome (362444666444263).

The spelling of 210040135404251 in words is "two hundred ten trillion, forty billion, one hundred thirty-five million, four hundred four thousand, two hundred fifty-one".