221431464522652 has 12 divisors (see below), whose sum is σ = 390292869123640. Its totient is φ = 109919216201616.

The previous prime is 221431464522649. The next prime is 221431464522691. The reversal of 221431464522652 is 256225464134122.

It is a super-2 number, since 2×221431464522652² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221431464522596 and 221431464522605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199129014303 + ... + 199129015414.

Almost surely, 2^{221431464522652} is an apocalyptic number.

It is an amenable number.

221431464522652 is a deficient number, since it is larger than the sum of its proper divisors (168861404600988).

221431464522652 is a wasteful number, since it uses less digits than its factorization.

221431464522652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398258029860 (or 398258029858 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 49.

The spelling of 221431464522652 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixty-four million, five hundred twenty-two thousand, six hundred fifty-two".