213851444975997 has 32 divisors (see below), whose sum is σ = 310621547520000. Its totient is φ = 130352327582400.

The previous prime is 213851444975969. The next prime is 213851444976007. The reversal of 213851444975997 is 799579444158312.

It is not a de Polignac number, because 213851444975997 - 2¹⁴ = 213851444959613 is a prime.

It is a super-2 number, since 2×213851444975997² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213851444975897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22998129 + ... + 30929222.

It is an arithmetic number, because the mean of its divisors is an integer number (9706923360000).

Almost surely, 2^{213851444975997} is an apocalyptic number.

It is an amenable number.

213851444975997 is a deficient number, since it is larger than the sum of its proper divisors (96770102544003).

213851444975997 is a wasteful number, since it uses less digits than its factorization.

213851444975997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53929801.

The product of its digits is 2743372800, while the sum is 78.

The spelling of 213851444975997 in words is "two hundred thirteen trillion, eight hundred fifty-one billion, four hundred forty-four million, nine hundred seventy-five thousand, nine hundred ninety-seven".