213424444223145 has 48 divisors (see below), whose sum is σ = 379002117312000. Its totient is φ = 111037343120640.

The previous prime is 213424444223119. The next prime is 213424444223173. The reversal of 213424444223145 is 541322444424312.

213424444223145 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 2 + 44 + 442 + 23 + 145 = 666.

It is not a de Polignac number, because 213424444223145 - 2³⁷ = 213287005269673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213424444223145.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9400776 + ... + 22698534.

It is an arithmetic number, because the mean of its divisors is an integer number (7895877444000).

Almost surely, 2^{213424444223145} is an apocalyptic number.

It is an amenable number.

213424444223145 is a deficient number, since it is larger than the sum of its proper divisors (165577673088855).

213424444223145 is a wasteful number, since it uses less digits than its factorization.

213424444223145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306510 (or 13306507 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 45.

Adding to 213424444223145 its reverse (541322444424312), we get a palindrome (754746888647457).

The spelling of 213424444223145 in words is "two hundred thirteen trillion, four hundred twenty-four billion, four hundred forty-four million, two hundred twenty-three thousand, one hundred forty-five".