69213681 has 12 divisors (see below), whose sum is σ = 105856452. Its totient is φ = 43428096.

The previous prime is 69213679. The next prime is 69213689. The reversal of 69213681 is 18631296.

It can be written as a sum of positive squares in 2 ways, for example, as 45360225 + 23853456 = 6735^2 + 4884^2 .

It is not a de Polignac number, because 69213681 - 2¹ = 69213679 is a prime.

It is a super-2 number, since 2×69213681² = 9581067275139522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69213689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226036 + ... + 226341.

It is an arithmetic number, because the mean of its divisors is an integer number (8821371).

Almost surely, 2^69213681 is an apocalyptic number.

It is an amenable number.

69213681 is a deficient number, since it is larger than the sum of its proper divisors (36642771).

69213681 is a wasteful number, since it uses less digits than its factorization.

69213681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452400 (or 452397 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 69213681 is about 8319.4760051340. The cubic root of 69213681 is about 410.5795512065.

The spelling of 69213681 in words is "sixty-nine million, two hundred thirteen thousand, six hundred eighty-one".