345525513224221 has 16 divisors (see below), whose sum is σ = 386123682732480. Its totient is φ = 306536192414080.

The previous prime is 345525513224179. The next prime is 345525513224257. The reversal of 345525513224221 is 122422315525543.

It is a cyclic number.

It is not a de Polignac number, because 345525513224221 - 2⁴⁷ = 204788024868893 is a prime.

It is a super-2 number, since 2×345525513224221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345525513224291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1942965046 + ... + 1943142871.

It is an arithmetic number, because the mean of its divisors is an integer number (24132730170780).

Almost surely, 2^{345525513224221} is an apocalyptic number.

It is an amenable number.

345525513224221 is a deficient number, since it is larger than the sum of its proper divisors (40598169508259).

345525513224221 is a wasteful number, since it uses less digits than its factorization.

345525513224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886108124.

The product of its digits is 2880000, while the sum is 46.

Adding to 345525513224221 its reverse (122422315525543), we get a palindrome (467947828749764).

The spelling of 345525513224221 in words is "three hundred forty-five trillion, five hundred twenty-five billion, five hundred thirteen million, two hundred twenty-four thousand, two hundred twenty-one".