213078682581 has 32 divisors (see below), whose sum is σ = 305546557440. Its totient is φ = 131736331584.

The previous prime is 213078682573. The next prime is 213078682631. The reversal of 213078682581 is 185286870312.

It is not a de Polignac number, because 213078682581 - 2³ = 213078682573 is a prime.

It is a super-2 number, since 2×213078682581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213078682541) 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, 575040 + ... + 869958.

It is an arithmetic number, because the mean of its divisors is an integer number (9548329920).

Almost surely, 2^213078682581 is an apocalyptic number.

It is an amenable number.

213078682581 is a deficient number, since it is larger than the sum of its proper divisors (92467874859).

213078682581 is a wasteful number, since it uses less digits than its factorization.

213078682581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295265.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 213078682581 in words is "two hundred thirteen billion, seventy-eight million, six hundred eighty-two thousand, five hundred eighty-one".