210540162215251 has 8 divisors (see below), whose sum is σ = 231332552337600. Its totient is φ = 190023167988840.

The previous prime is 210540162215239. The next prime is 210540162215267. The reversal of 210540162215251 is 152512261045012.

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 210540162215251 - 2¹¹ = 210540162213203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210540162215251.

It is not an unprimeable number, because it can be changed into a prime (210540162215221) 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, 68848972381 + ... + 68848975438.

It is an arithmetic number, because the mean of its divisors is an integer number (28916569042200).

Almost surely, 2^{210540162215251} is an apocalyptic number.

210540162215251 is a deficient number, since it is larger than the sum of its proper divisors (20792390122349).

210540162215251 is a wasteful number, since it uses less digits than its factorization.

210540162215251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137697947969.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 210540162215251 in words is "two hundred ten trillion, five hundred forty billion, one hundred sixty-two million, two hundred fifteen thousand, two hundred fifty-one".