221525632472342 has 16 divisors (see below), whose sum is σ = 363166538483664. Its totient is φ = 100507344588000.

The previous prime is 221525632472323. The next prime is 221525632472351. The reversal of 221525632472342 is 243274236525122.

It is a super-2 number, since 2×221525632472342² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9306223709 + ... + 9306247512.

It is an arithmetic number, because the mean of its divisors is an integer number (22697908655229).

Almost surely, 2^{221525632472342} is an apocalyptic number.

221525632472342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221525632472342 is a deficient number, since it is larger than the sum of its proper divisors (141640906011322).

221525632472342 is a wasteful number, since it uses less digits than its factorization.

221525632472342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18612471775.

The product of its digits is 9676800, while the sum is 50.

Adding to 221525632472342 its reverse (243274236525122), we get a palindrome (464799868997464).

The spelling of 221525632472342 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, six hundred thirty-two million, four hundred seventy-two thousand, three hundred forty-two".