213455436664442 has 16 divisors (see below), whose sum is σ = 366073145452800. Its totient is φ = 91443516492048.

The previous prime is 213455436664441. The next prime is 213455436664453. The reversal of 213455436664442 is 244466634554312.

It is a super-2 number, since 2×213455436664442² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213455436664441) 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, 3115375817 + ... + 3115444332.

It is an arithmetic number, because the mean of its divisors is an integer number (22879571590800).

Almost surely, 2^{213455436664442} is an apocalyptic number.

213455436664442 is a deficient number, since it is larger than the sum of its proper divisors (152617708788358).

213455436664442 is a wasteful number, since it uses less digits than its factorization.

213455436664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230822605.

The product of its digits is 199065600, while the sum is 59.

The spelling of 213455436664442 in words is "two hundred thirteen trillion, four hundred fifty-five billion, four hundred thirty-six million, six hundred sixty-four thousand, four hundred forty-two".