213461321769 has 12 divisors (see below), whose sum is σ = 308371699636. Its totient is φ = 142289695872.

The previous prime is 213461321747. The next prime is 213461321783. The reversal of 213461321769 is 967123164312.

213461321769 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 613 + 21 + 7 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 112091040000 + 101370281769 = 334800^2 + 318387^2 .

It is not a de Polignac number, because 213461321769 - 2⁵ = 213461321737 is a prime.

It is a super-2 number, since 2×213461321769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213461321789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411732 + ... + 1555605.

Almost surely, 2^213461321769 is an apocalyptic number.

It is an amenable number.

213461321769 is a deficient number, since it is larger than the sum of its proper divisors (94910377867).

213461321769 is a wasteful number, since it uses less digits than its factorization.

213461321769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975336 (or 2975333 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 213461321769 in words is "two hundred thirteen billion, four hundred sixty-one million, three hundred twenty-one thousand, seven hundred sixty-nine".